0912 整理

pom.xml

@@ -1,112 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-
-  <groupId>com.sf</groupId>
-  <artifactId>Java0715</artifactId>
-  <version>1.0-SNAPSHOT</version>
-
-  <name>Java0715</name>
-  <!-- FIXME change it to the project's website -->
-  <url>http://www.example.com</url>
-
-  <properties>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <maven.compiler.source>1.8</maven.compiler.source>
-    <maven.compiler.target>1.8</maven.compiler.target>
-  </properties>
-
-  <dependencies>
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <version>4.12</version>
-      <scope>test</scope>
-    </dependency>
-
-    <!-- https://mvnrepository.com/artifact/commons-io/commons-io -->
-    <dependency>
-      <groupId>commons-io</groupId>
-      <artifactId>commons-io</artifactId>
-      <version>2.4</version>
-    </dependency>
-
-
-    <dependency>
-      <groupId>mysql</groupId>
-      <artifactId>mysql-connector-java</artifactId>
-      <version>5.1.47</version>
-    </dependency>
-
-
-    <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
-    <dependency>
-      <groupId>com.alibaba</groupId>
-      <artifactId>druid</artifactId>
-      <version>1.2.6</version>
-    </dependency>
-
-    <dependency>
-      <groupId>org.testng</groupId>
-      <artifactId>testng</artifactId>
-      <version>7.8.0</version>
-      <scope>compile</scope>
-    </dependency>
-    <dependency>
-      <groupId>org.junit.jupiter</groupId>
-      <artifactId>junit-jupiter</artifactId>
-      <version>RELEASE</version>
-      <scope>compile</scope>
-    </dependency>
-
-<!--    测试-->
-  </dependencies>
-
-  <build>
-    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
-      <plugins>
-        <!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
-        <plugin>
-          <artifactId>maven-clean-plugin</artifactId>
-          <version>3.1.0</version>
-        </plugin>
-        <!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
-        <plugin>
-          <artifactId>maven-resources-plugin</artifactId>
-          <version>3.0.2</version>
-        </plugin>
-        <plugin>
-          <artifactId>maven-compiler-plugin</artifactId>
-          <version>3.8.0</version>
-        </plugin>
-        <plugin>
-          <artifactId>maven-surefire-plugin</artifactId>
-          <version>2.22.1</version>
-        </plugin>
-        <plugin>
-          <artifactId>maven-jar-plugin</artifactId>
-          <version>3.0.2</version>
-        </plugin>
-        <plugin>
-          <artifactId>maven-install-plugin</artifactId>
-          <version>2.5.2</version>
-        </plugin>
-        <plugin>
-          <artifactId>maven-deploy-plugin</artifactId>
-          <version>2.8.2</version>
-        </plugin>
-        <!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
-        <plugin>
-          <artifactId>maven-site-plugin</artifactId>
-          <version>3.7.1</version>
-        </plugin>
-        <plugin>
-          <artifactId>maven-project-info-reports-plugin</artifactId>
-          <version>3.0.0</version>
-        </plugin>
-      </plugins>
-    </pluginManagement>
-  </build>
-</project>

src/main/java/com/sf/RR.java

@@ -1,36 +0,0 @@
-package com.sf;
-
-import org.junit.jupiter.api.Test;
-
-public class RR {
-    @Test
-    public void t1(){
-        /**
-         * 1、什么是试听课？1、老师给你解答一下你自己困惑？还是写一段代码？
-         * 2、java？  学没学过？在学校学到哪里？  - 讲那部分？ - 区分咱们讲课  学校老师
-         *      知识点   - 学过  但是不会   咱们将  - 讲明白     -- 区别
-         * 3、后端  c c++   python  go   安卓   --java  性价比更高     学习的难度   入门门槛
-         *   c c++  python   不够
-         *   java
-         *   java   ？   java ?  java ？
-         *   感受一下  java代码
-         *   c   c++   区分   语法      4-5
-         *   java代码    - for  删除A        指针前移     - 数据有遗漏
-         *   i++  ++i;
-         *   for()
-         *
-         *   2、如何解决
-         *        add    扩容   -CC
-         *
-         *  问一下   听没听懂？
-         *  老师 咱们老师     自学和系统学习
-         *   我上课    开发的东西      --
-         *   公司的优势  真实项目       就业   班主任
-         *   课程大概 ：
-         *   回扣    专题课     多线程  数据结构     --面试
-         *   我自己上课的特点： 幽默   枯燥
-         *   目的   学习   学会   遵守         ---
-         *   web
-         */
-    }
-}

src/main/java/com/sf/Test07.java

@@ -1,28 +0,0 @@
-package com.sf;
-
-public class Test07 {
-    public static void main(String[] args) {
-        Father f = new Son();
-        System.out.println(f.x);
-    }
-}
-class Father{
-    int x = 10;
-    public Father(){
-        this.print();
-        x = 20;
-    }
-    public void print(){
-        System.out.println("Father.x = " + x);
-    }
-}
-class Son extends Father{
-    int x = 30;
-    public Son(){
-        this.print();
-        x = 40;
-    }
-    public void print(){
-        System.out.println("Son.x = " + x);
-    }
-}

src/main/java/com/sf/javase/T.java

@@ -1,101 +0,0 @@
-package com.sf.javase;
-
-import org.junit.jupiter.api.Test;
-
-import java.sql.SQLIntegrityConstraintViolationException;
-import java.util.Arrays;
-
-public class T {
-    /**
-     *
-     * 思路：
-     *  为啥选择java开发呢    同样后端开发还有c c++  python    go   android
-     *  前端  ： web开发
-     *  同学回复：在学校学过   或者是自家亲属在从事这个岗位
-     *  开始对比  4个岗位     筛选出java的性价比是最高
-     *  然后在说一下java 的岗位市场前景  还是薪资待遇 （同比与其他几种语言相对是简单的  并且薪资也是比较可观的）
-     *  先看一下  Java的boss直聘内容
-     *  说一下课程大纲
-     *  区分自学和系统学习
-     *  在简单的举个例子    删除包含a字母的元素
-     *
-     *  集合的添加
-     *
-     *  最后说一下咱们公司的优势：
-     *   有自己的互联网企业
-     *   然后真实的互联网项目   -  这也的优势在于跟随互联网技术的发展   以及语法的发展
-     *   后期就业保障  专业的就业老师  - 内推  班主任全程跟踪
-     *   督促学生进行学习
-     *
-     *
-     * 自我的优势：
-     * 就是上课没有枯燥   喜欢把公司开发的一些事情说给你们
-     * 前端开发和后端开发 都不爱干活的问题
-     * 还有公司的一些规定
-     *
-     *
-     */
-    //求数组元素的最大值
-    @Test
-    public void t1(){
-        int[] arr = {4,5,6,1,9};
-        //找最大值
-        //假设第一个元素就是最大值
-       int max = arr[0];
-       for (int i = 0;i< arr.length-1;i++){
-           if(arr[i+1] > max){
-               max = arr[i+1];
-           }
-       }
-        System.out.println(max);
-    }
-
-    /**
-     * 分析以下需求，并用代码实现：
-     * （1）在编程竞赛中，有10位评委为参赛的选手打分，分数分别为：5，4，6，8，9，0，1，2，7，3
-     * （2）求选手的最后得分（去掉一个最高分和一个最低分后其余8位评委打分的平均值）
-     */
-    @Test
-    public void t2(){
-        int[] scores = {5,4,6,8,9,0,1,2,7,3};
-        //最高分和最低分
-        int max = scores[0];
-        int min = scores[0];
-        int sum = 0;
-        for (int i = 0;i<=scores.length-1;i++){
-            if(max<scores[i]){
-                max = scores[i];
-            }
-            if(max > scores[i]){
-                min = scores[i];
-            }
-            sum += scores[i];
-        }
-        int sumAvg = sum - max - min;
-        double avg = (double) sumAvg/(scores.length - 2);
-        System.out.println(avg);
-    }
-
-
-    /**
-     * ：创建一个长度为6的int型数组，要求数组元素的值都在1-30之间，且是随机赋值。同时，要求元素的值各不
-     * 相同。
-     */
-
-    @Test
-    public void t3(){
-      int[] arr =  new int[6];
-      for (int i = 0;i<arr.length;i++){
-          arr[i] = (int) (Math.random()*30)+1;
-          for (int j = 0;j<i;j++){
-              if(arr[i] == arr[j]){
-                 i--;
-                 break;
-              }
-          }
-      }
-        System.out.println(arr);
-        System.out.println(Arrays.toString(arr));
-
-    }
-}

src/main/java/com/sf/javase/TR.java

@@ -1,95 +0,0 @@
-package com.sf.javase;
-
-import org.junit.jupiter.api.Test;
-
-import java.util.ArrayList;
-import java.util.Iterator;
-import java.util.List;
-
-public class TR {
-    @Test
-    public void t1(){
-    //   java   后端开发   c c++  python    an    go
-    /**
-     * java c
-     * c  学到哪里   指针 文件操作
-     * int[] ints = {1,2,3,4,5};
-     *             index =  0,1,2,3,4
-     * sout  -> ints    结果？  x = 12345
-     * sout ->  ints   ints[0]     ==  1
-     * java   不是
-     * sout -> ints   -  地址 ？ toString  数组没有重写toString方法  --> object
-     *
-     * java   c   在大学   --->就业
-     * java  and  c      java  or  c
-     * 区别：就业前景    薪资   难度     市场就业情况
-     * 1、java   >  c
-     * 3、java   <  c
-     * 2、java   =  c
-     * 4、java   >  c
-     *   c  <  java
-     * 提升学历  考研？ 就业
-     * 学历   =  本科     java   入门的门槛就是本科     （专科  == 本科）    专业
-     * c    门槛要高一些    - 底层地址    +  算法要求  +  硬件
-     *
-     * java 软件    c
-     *
-     *
-     *  对于基础知识 ： Java 和 c   文件操作    - 50% 相似  一样
-     *  javase   一部分
-     *  int[] ints = {1,2,"admin"};  // java  有办法能放进去    ---反射
-     *  int[]   int    ”admin“  String     类    引用数据类型    --  object  父类
-     *  现在通过反射     动态的获取的类的模板结构   - 动态执行方法 Method     -- object
-     *
-     *  java   /   web
-     *  html   jss   jq
-     *  好一点：时间长一点还是后端     稳定
-     *  两个方向    - 稳定
-     *  各有各自的好处 ：
-     *  java   好处的就是相对来说稳定   工资会高一点      知识点会多一些   枯燥
-     *  web    html  -> 浏览器   html  解析  <img  src = ”“></>   不好出  后期的工资和发展前景会不如后端
-     *
-     *
-     *  java  ： i++  ++i
-     *        啥区别：
-     *  i++/++i :
-     *      在没有接收值，i++   ++i    一样     都是对变量i+1操作
-     *      有接收值的情况的下  i++   满足先运算后赋值   ++i 满足先赋值后运算    i++  ++i
-     *
-     *   集合：list
-     *
-     */
-        List<String> list = new ArrayList<>();  //创建一个集合 {容器}     = <String>   字符串
-        list.add("adm");
-        list.add("abc");
-        list.add("sjfm");
-        list.add("ajkjfa");
-        list.add("aof");
-        System.out.println(list);
-        /**
-         * 介绍一下源码：
-         * toString   -- >
-         * "[" list？数据  数据个数  ”]“  1个数据
-         * "[" list？数据  for ,  数据个数  ”]“  多个数据
-         *
-         * 需求 删除包含a字母的元素
-         */
-        System.out.println("==============");
-//        for(int i = 0;i<list.size()-1;i++){
-//            if(list.get(i).contains("a")){
-//                list.remove(i);
-//                i--;
-//            }
-//        }
-//        System.out.println(list);
-
-        //  最好的处理方式  迭代器
-        Iterator<String> iterator = list.iterator();
-        while (iterator.hasNext()){
-            if(iterator.next().contains("a")){
-                iterator.remove();
-            }
-        }
-        System.out.println(list);
-    }
-}

src/main/java/com/sf/javase/WW.java

@@ -1,15 +0,0 @@
-package com.sf.javase;
-
-import org.junit.jupiter.api.Test;
-
-import java.util.ArrayList;
-import java.util.List;
-
-public class WW {
-
-    @Test
-    public void t1() {
-
-
-    }
-}

src/main/java/com/sf/javase/day01/Test1.java

@@ -1,79 +0,0 @@
-package com.sf.javase.day01;
-
-import org.junit.jupiter.api.Test;
-
-/**
- * java基础语法
- *
- */
-public class Test1 {
-    public static final  String ADDRESS_IP = "192.168.1.1";
-     @Test
-    public void t1(){
-        /**
-         * 验证标识符 ：
-         * 1、26个英文字母大小写  0-9  _$
-         * 2、数字不能作为开头
-         * 3、可以包含关键字和保留字 但不能是关键字和保留字
-         * 4、java 严格区分大小写  长度没有限制
-         * 5、不能包含空格
-         */
-        int a = 1;
-        int A = 1;
-        int voidD = 10;
-        int a1 = 10;
-        int A111 = 10;
-//        int 1a = 10;\
-        int dogAge = 12;
-         System.out.println(dogAge);//12
-    }
-
-
-    /**
-     * 变量分类：
-     * 基本数据类型：
-     *      整型：byte short int(默认)   long
-     *      4？空间   byte   int
-     *              表数范围：
-     *            1字节 2字节  4字节     8字节
-     *            1字节   =  8bit
-     *            2^8  = 256    首位是符号位  +-   -128  0 127
-     *
-     *            int ：4字节 = 32位    2^32       -2^31  - 2^31-1
-     *       浮点型：float单精度  double(默认) 双精度   4   8
-     *
-     *      字符型：char 2字节 a    abc    字符和整型可以互相转换  ASCII码
-     *              a  = 97   A  = 65
-     *              字符和整型运算  - - 整型
-     *       不同数据类型在进行运算时   容量小的 -- 容量大的
-     *       int   +  double   ===double
-     *       char +  int    ===  int
-     *      布尔类型：  boolean  真假   真  true   假 false;
-     *      boolean  flag = true;
-     *
-     * 引用数据类型:
-     * 类   接口  数组  String 类
-     * String 是关键字吗？
-     * 不是，String是一个类 并且是用final修饰的类  是数据类型 - 引用数据类型
-     *
-     * 变量的声明位置：
-     * 类内方法外：类变量   作用整个类中
-     * 类内方法内：局部变量   作用在当前方法中
-     */
-    @Test
-    public void t2(){
-        byte  num = 12;
-        byte num1 = (byte) 129;
-        long num2 = 123L;
-//        int num3 = (int) 123L;
-        int num3 =  123;
-
-        float num4 = (float) 12.3;
-        float num5 = 12.3F;
-        double num6 = 12.3D;
-
-        char str = 'a';
-        System.out.println((int) str);
-        System.out.println(str+3);
-    }
-}

src/main/java/com/sf/javase/day01/TestC.java

@@ -1,47 +0,0 @@
-package com.sf.javase.day01;
-
-import org.junit.jupiter.api.Test;
-
-/**
- * 这是一个测试类
- */
-public class TestC {
-    //测试一下环境   主函数   java应用程序启动的入口   主函数
-    //  psvm  +  回车
-    //  public  权限修饰符 （之一）  公开的 公共的
-    //  static  关键字 - 其他修饰符    静态的    语法： 用static修饰的方法   静态方法
-    //  方法（函数）： 权限修饰符  【其他修饰符】  返回值类型(有/无void)  方法名(【参数】){
-    //  //  代码体
-    //  }
-
-    /**
-     * 主函数   程序启动的入口
-     * @param args
-     */
-    public static  void main(String[] args){
-        System.out.println(111);
-        System.out.println(123);
-        t1();
-    }
-
-    // 测试方法  静态
-    @Test
-    public static void t1(){
-        System.out.println("---");
-    }
-
-    // 测试方法  非静态
-    @Test
-    public void t2(){
-        t3();
-        t1();
-        System.out.println("---");
-    }
-
-    @Test
-    public  void t3(){
-        System.out.println("---");
-    }
-
-
-}

src/main/java/com/sf/javase/day01/TestFirst.java

@@ -1,29 +0,0 @@
-package com.sf.javase.day01;
-
-/**
- * 这是java第一个类
- */
-public class TestFirst {
-    //主函数
-    public static void main(String[] args){
-        /**
-         * java中的注释分为三种
-         * // 后面  单行注释   多行注释  文本注释
-         *  ps : 注释之间不能进行嵌套    -- 单行除外
-         *
-         */
-        //todo   注释   这里有事情没做完
-        /*
-        多行注释
-         */
-        //  /////
-        /**
-         * 文档注释    类 方法上
-         */
-        System.out.println("Hello World1");
-        System.out.println("Hello World2");
-        System.out.println("Hello World3");
-        System.out.print("Hello World4");
-        System.out.print("Hello World5");
-    }
-}

src/main/java/com/sf/javase/day02/T.java

@@ -1,305 +0,0 @@
-package com.sf.javase.day02;
-
-import org.junit.jupiter.api.Test;
-import sun.java2d.pipe.SpanIterator;
-
-import java.security.PublicKey;
-import java.util.Scanner;
-
-/**
- * 第二天的java类
- */
-public class T {
-    /**
-     * 作业问题：
-     * 1、三目运算符
-     * 2、奇数偶数问题
-     */
-    @Test
-    public void t1(){
-        //  97 是奇数还是偶数？
-        int num = 97;
-        /**
-         * 三目运算符的语法结构：
-         * boolean flag =  (条件表达式)?返回值1:返回值2;
-         *
-         */
-       boolean flag = num % 2 == 0 ? true:false;
-//        if(num % 2 == 0){
-//            System.out.println("偶数");
-//        }else {
-//            System.out.println("奇数");
-//        }
-        System.out.println(flag);
-    }
-
-    @Test
-    public void t2(){
-        /**
-         * a++   ++a 区别:
-         * num++  和 ++num   在没有接收值的情况下效果一样，都是对变量进行+1操作
-         * 有接收值的情况下：int C  = num++;
-         *      满足：先赋值后运算
-         *   int C  = ++num;
-         *      满足：先运算后赋值
-         *  总结：    【先赋值后运算   先运算后赋值】  ==>  在乎赋值的先后，都进行运算（变量）
-         *
-         *   +=：
-         *   int a = 1;
-         *   a += 1;  // a = a+1
-         *
-         *   &  &&:
-         *   & 逻辑与   前后都运行
-         *   && 短路与  ：前面为假   后面被短路    若前面为真   后面需要运行
-         *   |  || ：
-         *   | 逻辑或 ： 无论真假前后都需要运行
-         *   ||  短路或  ：若前面为真  后面被短路    若前面为假，后面运行
-         *
-         *   异或: 相同为假   相异为真
-         *
-         */
-        int num = 10;
-//        num++;  //  result :  11
-//        ++num;   // result :  11
-//        int c = num++;   // num = 11;  c  = 10;
-        int c  = ++num;
-        System.out.println("num  = "+num);
-        System.out.println("c  = "+c);
-    }
-
-    @Test
-    public void t3() {
-//        int x = 1;
-//        int y=1;
-//        if(x++ == 2 & ++y == 2){
-//            x =7;
-//        }
-//        System.out.println("x="+x+",y="+y);
-//    }
-
-//        int x = 1, y = 1;
-//        if (x++ == 2 && ++y == 2) {
-//            x = 7;
-//        }
-//        System.out.println("x=" + x + ",y=" + y);
-
-//        int x = 1,y = 1;
-//        if(x++==1 | ++y==1){
-//            x =7;
-//        }
-//        System.out.println("x="+x+",y="+y);
-        int x = 1,y = 1;
-        if(x++==1 || ++y==1){
-            x =7;
-        }
-        System.out.println("x="+x+",y="+y);
-    }
-
-    @Test
-    public void t4(){
-        /**
-         * 三目运算符：
-         * 语法格式：数据类型  变量名 =   (条件表达式)?返回值1:返回值2
-         *      ps:返回值1:返回值2     = 数据类型
-         *         求出三个数中的最大值：
-         *         int  x = 9, y =5 ,z = 8;
-         */
-        int  x = 7, y =5 ,z = 8;
-       x = (x>y)?x:y;
-       x= (x>z)?x:z;
-       System.out.println(x);
-    }
-
-    /**
-     * 从键盘输入  用主函数进行测试
-     */
-    public static void main(String[] args) {
-        Scanner scan = new Scanner(System.in);
-//        // 输入一个名字  年龄   true   体重 123.4
-//        System.out.println("请输入名字~");
-//        String name = scan.next();
-//        System.out.println(name);
-//        System.out.println("请输入年龄~");
-//        int age = scan.nextInt();
-//        System.out.println(age);
-//        System.out.println("请输入true~");
-//        boolean flag = scan.nextBoolean();
-//        System.out.println(flag);
-//        System.out.println("请输入体重~");
-//        double weight = scan.nextDouble();
-//        System.out.println(weight);
-        int score = scan.nextInt();
-        if(score <= 100 && score >=0){
-            if(score < 60){
-                System.out.println("DDD");
-            }else if (score>=60 && score <80){
-                System.out.println("ccc");
-            }else if (score>=80 && score <90){
-                System.out.println("bbb");
-            }else {
-                System.out.println("aaa");
-            }
-        }else {
-            System.out.println("输入有误");
-        }
-
-
-    }
-
-
-    /**
-     * 随机数  Math
-     */
-    @Test
-    public void t6(){
-//        for (int i = 0; i < 33; i++) {
-//            double random = Math.random(); //[0,1)
-//            System.out.println(random);
-//        }
-        double random = Math.random(); //[0,1)
-            System.out.println(random);
-            //随机生成一个0-99的整数  [1,100]
-        int num = (int) (Math.random()*100+1);
-        System.out.println(num);
-        //[5，78] 整型    73/74 + 5     --->  int   [a,b]  b-a+1 +a
-        int num2 = (int) (Math.random() * 74 +5);
-        int num3 = (int) (Math.random()*13+78);
-        System.out.println(num3);
-    }
-
-
-    @Test
-    public void t7(){
-        int age = 16;
-        if(age>=18){
-            System.out.println("成年人");
-        }
-        else{
-            System.out.println("未成年人");
-        }
-    }
-
-    /**
-     * switch(age){
-     *     case 1:
-     *     //代码体
-     *     break;
-     *      case 1:
-     *      *     //代码体
-     *      *     break;
-     *    default：  //可选
-     *
-     * }
-     */
-    @Test
-    public void t8(){
-        //判断季节
-        String season = "summer1";
-        switch (season){
-            case "spring":
-            case "spring1":
-                System.out.println("春天");
-                break;
-            case "summer":
-            case "summer1":
-                System.out.println("夏天");
-                break;
-            case "autumn":
-                System.out.println("秋天");
-                break;
-            case "winter":
-                System.out.println("冬天");
-                break;
-            default:
-                System.out.println("输入有误");
-        }
-    }
-
-    /**
-     * for循环:
-     * for(1 初始化部分  2 条件判断  3 迭代){
-     *     4 循环体
-     * }
-     * 1  -  2 (判断  是否满足条件 是  -- 4 循环体  3-迭代   - 2条件判断(不  结束循环) )
-     *
-     *
-     * //双层for循环
-     * for(1 初始化部分  2 条件判断  3 迭代){
-     *  4  for( 5初始化部分  6 条件判断  7 迭代){
-     *          8 循环体
-     *       }
-     * }
-     *
-     * 1 2  4 5 6  8  7 6 (是否满足)  是  8 - 6 3 - 2   4
-     */
-    @Test
-    public void t9(){
-        /**
-         * 打印 01-100    01  02  03   10
-         */
-//        for (int i = 1;i<101;i++){
-//           if(i<10){
-//               System.out.println("0"+i);
-//           }else {
-//               System.out.println(i);
-//           }
-//        }
-   //  30    30.for+回车   itar
-        for (int i = 0; i < 30; i++) {
-            for (int i1 = 30; i1 > 0; i1--) {
-                System.out.println(30*30);
-            }
-        }
-    }
-
-    @Test
-    public void t10(){
-        int sum = 0 ;
-        for (int i = 0; i <=100; i++) {
-            sum += i;
-        }
-        System.out.println(sum);
-    }
-
-    /**
-     * 遍历1-100以内的偶数，
-     * 并获取偶数的个数，
-     * 获取所有的偶数的和
-     */
-    @Test
-    public void t11(){
-        int sum = 0;
-        int  count = 0;
-        for (int i = 1; i <=100; i++) {
-            if(i % 2 == 0){
-                count++;
-                sum += i;
-            }
-        }
-        System.out.println(sum);
-        System.out.println(count);
-    }
-
-    /**
-     * 输出1000以内所有的水仙花数，
-     * 所谓水仙花数是指一个3位数，
-     * 其各个位上数字立方和等于其本身
-     */
-    @Test
-    public void t13(){
-        int sum = 0;   //所有水仙花的总额和
-        int count = 0;   //水仙花的个数
-        for(int i = 100;i<1000;i++){
-            int gw = i%10;
-            int sw = i/10%10;
-            int bw = i/100;
-            if(gw*gw*gw + sw*sw*sw + bw*bw*bw == i){
-                count++;
-                sum += i;
-                System.out.println(i);
-            }
-        }
-        System.out.println(sum);
-        System.out.println(count);
-    }
-}

src/main/java/com/sf/javase/day03/ArrayTest.java

@@ -1,70 +0,0 @@
-package com.sf.javase.day03;
-
-import org.junit.jupiter.api.Test;
-
-import java.util.Arrays;
-
-/**
- * 一维数组
- */
-public class ArrayTest {
-    /**
-     * 一维数组的定义;
-     * int[] arr;
-     * int arr[];
-     * Sting[] str;
-     * Double[] num;
-     * User[] users;
-     */
-    @Test
-    public void t1(){
-        //静态初始化
-        int[] arr = new int[]{1,2,3,4};
-        System.out.println(arr.length);
-        int[] arr1;
-        arr1 = new int[]{1,2,3,4};
-
-//        int[] arr2;
-//        arr2 = {1,2,3,4};
-        int[] arr3 = {1,2,3,4,5};
-    }
-
-
-    /**
-     * 数组元素的获取和遍历
-     */
-    @Test
-    public void t2(){
-       String[] str = new String[]{"zs","ls","ww","zl"};
-       //数组获取元素   通过下标进行获取  0   1    2    3
-        // 结构   str[index]
-//        System.out.println(str[2]);
-        //for 遍历
-//         for (int i = 0;i<str.length;i++){
-//             System.out.println(str[i]);
-//         }
-         str[2] = "qq";
-
-         // 快捷键   数字.for    itar
-        for (int i = 0;i<str.length;i++){
-            System.out.println(str[i]);
-        }
-        System.out.println("========================");
-        System.out.println(Arrays.toString(str));
-
-        /**
-         *  for
-         *  for(String s  :  str){
-         *
-         *  }
-         *
-         *  str：要是遍历的集合/数组
-         *  s：数组中的每一个元素
-         *  String ：数组中的每一个元素的数据类型
-         *  快捷键   ： iter
-         */
-        for (String s : str) {
-            System.out.println(s);
-        }
-    }
-}

src/main/java/com/sf/javase/day03/ArrayWorker.java

@@ -1,97 +0,0 @@
-package com.sf.javase.day03;
-
-import org.junit.jupiter.api.Test;
-
-import java.util.Arrays;
-
-/**
- * 数组练习题
- */
-public class ArrayWorker {
-    /**
-     * 数组统计：求总和、均值
-     * 求数组元素的总乘积
-     */
-    @Test
-    public void t1(){
-        int[] arr = {4,5,6,1,9};
-        int sum = 0;
-        int result = 1;
-        double avg = 0.0;
-        //sum   avg
-        for (int i = 0;i<arr.length;i++){
-          sum +=  arr[i];
-            result *= arr[i];
-        }
-        System.out.println(sum);
-        avg =sum/arr.length;
-        System.out.println(avg);
-        System.out.println(result);
-    }
-
-    /**
-     * 求数组元素的最大值
-     */
-    @Test
-    public void t2(){
-        int[] arr = {4,5,6,1,9};
-        int max = arr[0];
-        for (int  i = 0;i<arr.length;i++){
-            if(arr[i]>max){
-                max = arr[i];
-            }
-        }
-        System.out.println(max);
-    }
-
-
-    /**
-     *    找最值大及其所有最大值的下标
-     */
-    @Test
-    public void t3(){
-        int[] arr = {4,5,9,1,9,9,3};
-        int max = arr[0];
-        int count = 0;
-        int pre = 0;
-        int[] arr1 = new int[arr.length];   //null  0
-        String index  = "0";
-        for (int i = 0; i < arr.length; i++) {
-         if(arr[i] > max){
-             max = arr[i];
-             pre = max;
-             arr1[count] = i;
-         }else if (arr[i] == max){
-             if(pre != max){
-                 count--;
-             }
-             arr1[++count] = i;
-         }
-        }
-        System.out.println(max);
-        System.out.println(index);
-        System.out.println(Arrays.toString(arr1));
-    }
-
-    @Test
-    public void t4(){
-        int[] scores = {5,4,6,8,9,0,1,2,7,3};
-        int max = scores[0];
-        int min = scores[0];
-        int sum = 0;
-        for (int i = 0; i < scores.length; i++) {
-            if (scores[i] > max) {
-                max = scores[i];
-            }
-            if (scores[i] < min) {
-                min = scores[i];
-            }
-            sum += scores[i];
-        }
-        double avg = (sum - max -min)*1.0/(scores.length-2);
-        System.out.println("总分"+sum);
-        System.out.println("最高分"+max);
-        System.out.println("最低分"+min);
-        System.out.println("平均分"+avg);
-    }
-}

src/main/java/com/sf/javase/day03/T.java

@@ -1,237 +0,0 @@
-package com.sf.javase.day03;
-import org.junit.jupiter.api.Test;
-import java.util.Arrays;
-
-/**
- * day03   while
- */
-public class T {
-    /**
-     * while循环的语法结构：
-     *  while(循环条件){    true   永真循环   死循环
-     *      //循环体
-     *  }
-     */
-    @Test
-    public void t1(){
-        //利用while循环计算1-100的和
-        int i  = 1;
-        int sum = 0;
-        while (i<=100){
-            sum += i;
-            i++;
-        }
-        System.out.println("总和  = "+sum);
-    }
-
-    /**
-     * do  while
-     * do{
-     *
-     * }while();
-     *
-     * do while  无论条件是否满足  都先执行一次
-     * while  先判断条件是否满足
-     */
-    @Test
-    public void t2(){
-        //用 do while循环写一下1-100的和
-        int  i = 1;
-        int sum = 0;
-        do {
-            sum += i;
-            i++;
-        }while (i <=100);
-        System.out.println(sum);
-    }
-
-    /**
-     * 9*9乘法表
-     */
-    @Test
-    public void t3(){
-        for (int i = 1;i<=9;i++){
-            for (int j = 1;j<=i;j++){
-                System.out.print(i+"*"+j+"="+i*j+"\t");
-            }
-            System.out.println();
-        }
-    }
-
-    /**
-     * //1—100之间的所有质数
-     * (质数是只能被1和他本身整除的数称为质数,1既不是质数也不是合数)
-     */
-    @Test
-    public void t4(){
-        for (int i = 2;i<=100;i++){
-            boolean flag = true;
-            for (int j = 2;j<i;j++){
-                if(i%j == 0){
-                    flag = false;
-                    break;
-                }
-            }
-            if(flag){
-                System.out.println(i);
-            }
-        }
-    }
-
-    /**
-     * 打印5行直角三角形
-     */
-    @Test
-    public void t5(){
-        for(int i = 1;i<=5;i++){
-            for (int j  = 1;j<=i;j++){
-                System.out.print("*");
-            }
-            System.out.println();
-        }
-    }
-
-    /**
-     * 将一天的时间打印到当前控制台上
-     */
-    @Test
-    public void t6(){
-        for(int hour = 0;hour<24;hour++){
-            for(int min = 0;min<60;min++){
-                for(int s = 0;s<60;s++){
-                    System.out.println(hour+"时"+min+"分"+s+"秒");
-                }
-            }
-        }
-    }
-
-    @Test
-    public void t7(){
-        /**
-         * 生成 1-100 之间的随机数，直到生成了 97 这个数，看看一共用了几次？
-         */
-        int count = 0;//记录次数
-        while (true){
-            int random = (int) (Math.random()*100)+1;
-            count++;
-            if(random == 97){
-                break;
-            }
-        }
-        System.out.println(count);
-    }
-
-    /**
-     * 方法：也称之为函数
-     * 方法的语法结构：权限修饰符   【其他修饰符】 方法的返回值类型   方法名(参数) throws异常{
-     *     //方法体
-     * }
-     *
-     * 权限修饰符;public
-     * 其他修饰符：static  静态的   静态方法
-     * 方法的返回值类型：有/无    int  string   对象   数组   集合 ....   无  void
-     * 方法名 ：标识符    创建规则：见名知意
-     * 参数：入参  出参     语法结构    数据类型 参数名 , ....
-     * 入参：形参和实参  ：   形参？  形式参数    get(int a);
-     *      实参：实际参数   我们在调用方法时传过来的参数
-     * //代码体：   有返回值  return   返回值
-     *              void    return;    可以  在java不建议
-     *             C： int main(){
-     *                 return 1;
-     *             }
-     * 注意点：方法不能单独存在  必须在类中   main函数    自定义的方法  并行
-     *          在同个类中  方法名不能相同
-     *
-     * static:静态方法 ：   调用   在同类   不同类
-     *
-     * 重载方法：  在一个类中，方法名相同  参数列表不同(参数个数不同 参数数据类型不同 顺序))     (权限修饰符   返回值类型)X
-     */
-    @Test
-    public void t8(){
-        //  实例方法可以调用实例方法、静态方法
-    insert();
-    insert("admin");
-    update();
-    }
-
-    //主函数
-    public static void main(String[] args) {
-//        insert();
-        // 静态方法必须调用静态
-        update();
-        String[] studentsInfos = getStudentsInfos();
-        System.out.println(Arrays.toString(studentsInfos));
-        int studentIndex = 1;
-        String student= getStudentInfosByIndex(studentIndex);
-        System.out.println(student);
-        char aChar = getChar();
-        System.out.println(aChar);
-    }
-
-
-    //自定义个一个方法
-    public void insert(){
-        System.out.println("信息插入");
-    }
-
-    public void insert(String name){
-        System.out.println("信息插入");
-    }
-
-    public void insert(int age,String name){
-        System.out.println("信息插入");
-    }
-
-    public void insert(String name,int age){
-        System.out.println("信息插入");
-    }
-
-
-    public static void update(){
-        System.out.println("update");
-    }
-
-    public static String[] getStudentsInfos(){
-       String[] str = new String[]{"zs","ls","ww"};
-       return str;
-    }
-
-    public static String getStudentInfosByIndex(int index){
-        String[] str = new String[]{"zs","ls","ww"};
-        return str[index];
-    }
-
-    public int sum(int ... args){
-        int sum1 = 0;
-        for (int i = 1;i<args.length;i++){
-            sum1 += args[i];
-        }
-        return sum1;
-    }
-
-    /**
-     * //设计一个方法可以返回A-Z之间的随机字符。 [65 90]
-     * public char getChar() {
-     * }
-     */
-    public static char getChar() {
-        return (char) ((Math.random()*26)+65);
-     }
-
-    /**
-     * 计算n 的阶乘
-     * @return
-     */
-    public int jc(int n){
-        if(n  == 1){
-            return 1;
-        }
-        return n * jc(n-1);
-    }
-
-    @Test
-    public void t10(){
-        int jc = jc(8);
-        System.out.println(jc);
-    }
-}

src/main/java/com/sf/javase/day03/T2.java

@@ -1,27 +0,0 @@
-package com.sf.javase.day03;
-
-import org.junit.jupiter.api.Test;
-
-/**
- * T2类
- */
-public class T2 {
-    public static void main(String[] args) {
-        //  不同类  静态方法调用   类名.方法名
-        //         实例方法   new对象   对象名.方法名
-        T.update();
-        T t = new T();
-        t.insert();
-        t.insert("admin");
-    }
-
-
-    @Test
-    public void t1(){
-        //实例方法    静态方法
-        T t = new T();
-        t.insert("ss");
-        t.insert();
-        T.update();
-    }
-}

src/main/java/com/sf/javase/day04/T.java

@@ -1,55 +0,0 @@
-package com.sf.javase.day04;
-
-import org.junit.jupiter.api.Test;
-
-import java.util.Arrays;
-
-/**
- * 第四天  数组
- */
-public class T {
-    @Test
-    public void t1(){
-        /**
-         * 数据类型[] 数组名 = new 数据类型[]{};
-         * 数据类型[] 数组名 = new 数据类型[数组的长度];
-         *
-         */
-        int[] arr = new int[5];
-        int[] arr1;
-        arr1 = new int[3];
-        System.out.println(Arrays.toString(arr1));
-        arr[0] = 10;
-        arr[1] = 10;
-        arr[2] = 11;
-        arr[3] = 12;
-        arr[3] = 20;
-        arr[4] = 13;
-//        arr[5] = 10;
-        System.out.println(Arrays.toString(arr));
-        for (int i = 0;i<arr.length;i++){
-            System.out.println(arr[i]);
-        }
-        for (int ele : arr){
-            System.out.println(ele);
-        }
-    }
-
-    /**
-     * 创建一个长度为6的int型数组，要求数组元素的值都在1-30之间，且是随机赋值,并要求不重复
-     */
-    @Test
-    public void t2(){
-        int[] arr = new int[6];
-        for (int i  =0 ;i<arr.length;i++){
-            arr[i] = (int) ((Math.random()*6)+1);
-            for(int j = 0;j<i;j++){
-                if(arr[i]  == arr[j]){
-                    i--;
-                    break;
-                }
-            }
-        }
-        System.out.println(Arrays.toString(arr));
-    }
-}

src/main/java/com/sf/javase/day04/T2.java

@@ -1,200 +0,0 @@
-package com.sf.javase.day04;
-
-import com.beust.ah.A;
-import org.junit.jupiter.api.Test;
-
-import java.util.Arrays;
-import java.util.Scanner;
-
-/**
- * 从键盘读入学生10成绩，找出最高分，并输出学生成绩等级。
- *
- * - 成绩>=最高分-10   等级为’A’
- *
- * - 成绩>=最高分-20  等级为’B’
- *
- * - 成绩>=最高分-30  等级为’C’
- *
- * - 其余            等级为’D’
- */
-public class T2 {
-    public static void main(String[] args) {
-        Scanner scanner = new Scanner(System.in);
-        System.out.println("请输入录入成绩的人数~");
-        int personCount = scanner.nextInt();
-        int[] score = new int[personCount];
-        //假设一个最大值
-        int max = 0;
-        for (int i = 0; i< score.length;i++){
-            score[i] = scanner.nextInt();
-            if(max < score[i]){
-                max = score[i];
-            }
-        }
-        System.out.println("最高分"+max);
-
-        char level;
-        //确定等级
-        for (int i = 0; i< score.length;i++){
-            if(score[i] >= max - 10){
-                 level = 'A';
-            }else if (score[i] >= max - 20 ){
-                level = 'B';
-            }else if (score[i] >= max - 30){
-                level = 'C';
-            }else {
-                level = 'D';
-            }
-            System.out.println(level);
-        }
-    }
-
-    @Test
-    public void t1(){
-        //声明初始化一个二维数组
-        int[][] arr = new int[][]{ {1,2},{1,2,3},{3,4,5,6}};
-        int[][] arr2 = new int[2][3];
-        //赋值
-        for (int i = 0 ;i<arr2.length ;i++){
-            for (int j = 0;j< arr2[i].length;j++){
-                arr2[i][j] = 3;
-            }
-        }
-
-        arr2[0][1] = 4;
-        System.out.println(Arrays.toString(arr2[0]));
-    }
-
-    /**
-     * 第一季度 每一个月的销售额 分别是 12，14，24，
-     *
-     * 第二季度 每一个月的销售额 分别是 23，18，35，
-     *
-     * 第三季度 每一个月的销售额 分别是 33，48，25，
-     *
-     * 第四季度 每一个月的销售额 分别是 27，28，35，
-     */
-    @Test
-    public void t3(){
-        int[][] arr = new int[][]{{12,14,24},{23,18,35},{33,48,25},{27,28,35}};
-        int sum = 0;
-        for (int i= 0;i<arr.length;i++){
-            for (int j= 0;j<arr[i].length;j++){
-                    sum += arr[i][j];
-            }
-        }
-        System.out.println(sum);
-        System.out.println(sum*1.0/12);
-    }
-
-    //数组的反转
-    @Test
-    public void t4(){
-        int[] arr = {1,2,3,4,5,6,7,8,9};
-//        for (int i  = 0;i< arr.length/2;i++){
-//           int temp = arr[i];
-//           arr[i] = arr[arr.length-i-1];
-//            arr[arr.length-i-1] = temp;
-//        }
-//        System.out.println(Arrays.toString(arr));
-        for (int left = 0,right = arr.length-1;left<right;left++,right--){
-            int temp = arr[left];
-            arr[left] = arr[right];
-            arr[right] = temp;
-        }
-        System.out.println(Arrays.toString(arr));
-    }
-
-
-    @Test
-    public void t5(){
-        //数组元素的复制
-        int[] arr = {1,2,3,4,5,6,7,8,9};
-        int[] arr1 = new int[arr.length];
-        for (int i = 0;i<arr.length;i++){
-            arr1[i] = arr[i];
-        }
-        System.out.println(Arrays.toString(arr1));
-    }
-
-    @Test
-    public void t2(){
-        //数组元素的查找
-        int[] arr = {1,2,3,4,5,6,7,8,9};
-        int value = 9;
-        int index = -1;
-        for(int i=0; i<arr.length; i++){
-            if(arr[i] == value){
-                index = i;
-                break;
-            }
-        }
-        if(index==-1){
-            System.out.println(value + "不存在");
-        }else{
-            System.out.println(value + "的下标是" + index);
-        }
-    }
-
-
-    /**
-     * 复制
-     */
-    @Test
-    public void t6(){
-        int[] arr = new int[]{1,2,3,4,5,67,67,8,89};
-       int[] arr1 =  new int[arr.length];
-       for(int i = 0;i<arr.length;i++){
-           arr1[i] = arr[i];
-        }
-        System.out.println(Arrays.toString(arr1));
-    }
-
-    /**
-     * 数组的元素查找
-     */
-    @Test
-    public void t7(){
-        int[] arr = new int[]{1,2,3,4,5,67,8,89};
-        int index = -1;
-        int val = 672;
-        for (int i= 0;i<arr.length;i++){
-            if(val == arr[i]){
-                index = i;
-                break;
-            }
-        }
-        if(index  == -1){
-            System.out.println("没有找到");
-        }else {
-            System.out.println("找到了  下标是"+index);
-        }
-    }
-
-    /**
-     * 二分查找   前提  必须是有序数组
-     */
-    @Test
-    public void t8(){
-        int[] arr = new int[]{1,2,3,4,5,67,81,89};
-        int val = 811;
-        int head = 0;
-        boolean flag = true;
-        int end = arr.length-1;
-        while (head<=end){
-            int middle = (head + end) / 2;
-            if(arr[middle] == val){
-                System.out.println("找到了  index= "+middle);
-                flag = false;
-                break;
-            }else if(arr[middle] > val){
-                end = middle -1;
-            }else {
-                head = middle+1;
-            }
-        }
-        if(flag){
-            System.out.println("没有找到~");
-        }
-    }
-}

src/main/java/com/sf/javase/day05/T.java

@@ -1,26 +0,0 @@
-package com.sf.javase.day05;
-
-import org.junit.jupiter.api.Test;
-
-import javax.swing.*;
-import java.util.Arrays;
-
-/**
- * Arrays工具类的使用
- */
-public class T {
-    @Test
-    public void t1(){
-        int[] arr = new int[]{6,5,3,2,1};
-        String s = Arrays.toString(arr);
-        System.out.println(s);
-        Arrays.sort(arr,2,5);
-        Arrays.sort(arr);
-        System.out.println(Arrays.toString(arr));
-
-        // 二分查找
-        int index = Arrays.binarySearch(arr, 15);
-        System.out.println(index);
-
-    }
-}

src/main/java/com/sf/javase/day06/Animal.java

@@ -1,18 +0,0 @@
-package com.sf.javase.day06;
-
-/**
- * 这是动物类
- */
-public class Animal {
-
-    String  name;
-    int age;
-
-    public void eat(){
-        System.out.println("小动物吃~");
-    }
-
-    public void run(String name){
-        System.out.println(name+"正在跑");
-    }
-}

src/main/java/com/sf/javase/day06/AnimalTest.java

@@ -1,21 +0,0 @@
-package com.sf.javase.day06;
-
-/**
- * 这是小动物的测试类
- */
-public class AnimalTest {
-    public static void main(String[] args) {
-        Animal animal = new Animal();
-        animal.name = "小狗";
-        animal.age = 1;
-        animal.eat();
-        animal.run(animal.name);
-
-        Animal animal1 = new Animal();
-        animal1.name = "小猫";
-        animal1.age=2;
-        animal1.eat();
-        animal1.run(animal1.name);
-    }
-
-}

src/main/java/com/sf/javase/day06/Car.java

@@ -1,38 +0,0 @@
-package com.sf.javase.day06;
-
-import java.util.Arrays;
-
-public class Car {
-    double weight;
-
-    int horsepower;
-    public  double proportion(){
-        return  horsepower*10*1.0/weight;
-    }
-
-    @Override
-    public String toString() {
-        return "Car{" +
-                "weight=" + weight +
-                ", horsepower=" + horsepower +
-                "proportion = "+proportion()+
-                '}';
-    }
-
-    public static void main(String[] args) {
-      Car[] cars =   new  Car[3];
-        Car car1 = new Car();
-        car1.weight = 1500;
-        car1.horsepower = 180;
-        Car car2 = new Car();
-        car2.weight = 1300;
-        car2.horsepower = 125;
-        Car car3 = new Car();
-        car3.weight = 2000;
-        car3.horsepower = 130;
-        cars[0] = car1;
-        cars[1] = car2;
-        cars[2] = car3;
-        System.out.println(Arrays.toString(cars));
-    }
-}

src/main/java/com/sf/javase/day06/ObjectArray/Student.java

@@ -1,36 +0,0 @@
-package com.sf.javase.day06.ObjectArray;
-
-import java.util.Arrays;
-
-public class Student {
-    int number;
-    int state;
-    int score;
-
-    @Override
-    public String toString() {
-        return "Student{" +
-                "number=" + number +
-                ", state=" + state +
-                ", score=" + score +
-                '}';
-    }
-
-
-    public static void main(String[] args) {
-        Student[] students = new Student[5];
-        for (int i= 0;i<students.length;i++){
-            Student student = new Student();
-            student.number = i+1;
-            student.state = (int)(Math.random()*5+1);
-            student.score = (int)(Math.random()*100+1);
-            students[i] = student;
-        }
-        System.out.println(Arrays.toString(students));
-        for (Student student : students) {
-            if(student.state == 3){
-                System.out.println(student);
-            }
-        }
-    }
-}

src/main/java/com/sf/javase/day06/Student.java

@@ -1,60 +0,0 @@
-package com.sf.javase.day06;
-
-/**
- * 这是一个学生类
- */
-public class Student {
-    String stuNo;
-    String name;
-    int age;
-    double weight;
-    double height;
-
-    public void study(){
-        System.out.println("学生学习");
-    }
-
-    public void  sleep(String name){
-        System.out.println(name+"  不好好学习 正在睡觉");
-    }
-
-    @Override
-    public String toString() {
-        return "Student{" +
-                "stuNo='" + stuNo + '\'' +
-                ", name='" + name + '\'' +
-                ", age=" + age +
-                ", weight=" + weight +
-                ", height=" + height +
-                '}';
-    }
-
-    /**
-     * 返回当前类对象的信息
-     */
-//    @Override
-//    public String toString() {
-//        return "Student { stuNo = "+stuNo
-//                +", name = "
-//                +name
-//                +",age +"
-//                +age+",weight = "
-//                +weight+",height"
-//                +height+"}";
-//    }
-
-
-
-    public static void main(String[] args) {
-        Student student = new Student();
-        student.stuNo = "1001";
-        student.name = "xss";
-        student.age = 18;
-        student.height = 138.6;
-        student.weight = 100.0;
-        student.study();
-        student.sleep(student.name);
-        String str = student.toString();
-        System.out.println(str);
-    }
-}

src/main/java/com/sf/javase/day06/T.java

@@ -1,16 +0,0 @@
-package com.sf.javase.day06;
-import org.junit.jupiter.api.Test;
-
-/**
- * 这是day06天的代码
- * 面向对象
- */
-public class T {
-
-    @Test
-    public void t1(){
-        double random = Math.random();
-
-    }
-
-}

src/main/java/com/sf/javase/day06/car/BSX.java

@@ -1,21 +0,0 @@
-package com.sf.javase.day06.car;
-
-/**
- * 这是变速箱类
- */
-public class BSX {
-    int dwCount;  //挡位的数量】
-
-    public String getinfo(){
-       return  "BSX{" +
-                "dwCount=" + dwCount +
-                '}';
-    }
-
-//    @Override
-//    public String toString() {
-//        return "BSX{" +
-//                "dwCount=" + dwCount +
-//                '}';
-//    }
-}

src/main/java/com/sf/javase/day06/car/Car.java

@@ -1,16 +0,0 @@
-package com.sf.javase.day06.car;
-
-/**
- * 这是汽车类
- */
-public class Car {
-    String carName;  //汽车名字
-    //发动机类  变速箱类 底盘类 （对象属性）
-    FDJ fdj;
-    BSX bsx;
-    DP dp;
-
-    public String  printInfo(){
-        return "Car{ fdj"+fdj.getInfo()+",bsx = "+bsx.getinfo()+",dp="+dp.getInfo();
-    }
-}

src/main/java/com/sf/javase/day06/car/CarTest.java

@@ -1,23 +0,0 @@
-package com.sf.javase.day06.car;
-
-/**
- * 这是car的测试类
- */
-public class CarTest {
-    public static void main(String[] args) {
-        Car car = new Car();
-        car.carName = "本田";
-        BSX bsx = new BSX();
-        bsx.dwCount = 7;
-        car.bsx = bsx;
-        FDJ fdj = new FDJ();
-        fdj.ml = 100;
-        fdj.pl = 1.5;
-        car.fdj = fdj;
-        DP dp = new DP();
-        dp.xgType = 1;
-        car.dp = dp;
-        String carStr = car.printInfo();
-        System.out.println(carStr);
-    }
-}

src/main/java/com/sf/javase/day06/car/DP.java

@@ -1,12 +0,0 @@
-package com.sf.javase.day06.car;
-
-public class DP {
-    int  xgType;
-    public String getInfo(){
-        return "DP{" +
-                "xgType=" + xgType +
-                '}';
-    }
-
-
-}

src/main/java/com/sf/javase/day06/car/FDJ.java

@@ -1,26 +0,0 @@
-package com.sf.javase.day06.car;
-
-/**
- * 这是发动机类
- */
-public class FDJ {
-
-    //马力
-    int ml;
-    //排量
-    double pl;
-    public String getInfo(){
-        return "FDJ{" +
-                "ml=" + ml +
-                ", pl=" + pl +
-                '}';
-    }
-
-//    @Override
-//    public String toString() {
-//        return "FDJ{" +
-//                "ml=" + ml +
-//                ", pl=" + pl +
-//                '}';
-//    }
-}

src/main/java/com/sf/javase/day06/person/Person.java

@@ -1,45 +0,0 @@
-package com.sf.javase.day06.person;
-
-/**
- * 这是person类
- */
-public class Person {
-    String name;
-    int age;
-    Phone phone;
-
-    public void study(){
-        System.out.println("studying~");
-    }
-
-    public void setName(String name){
-        this.name = name;
-    }
-
-    public String getName(){
-        return name;
-    }
-
-    public void setAge(int age){
-        this.age = age;
-    }
-
-    public int getAge(){
-        return age;
-    }
-
-     public String getInfo(){
-        return "Person{ name = "+name+", age = "+age+",Phone"+phone.getInfo()+"}";
-     }
-
-
-
-    public void printInfo(Phone phone){
-    getInfo();
-        System.out.println(phone.getInfo());
-    }
-
-
-
-
-}

src/main/java/com/sf/javase/day06/person/PersonTest.java

@@ -1,25 +0,0 @@
-package com.sf.javase.day06.person;
-
-
-/**
- * 这是测试类person
- */
-public class PersonTest {
-    public static void main(String[] args) {
-        Person person = new Person();
-//        person.age = 12;
-//        person.name = "zs";
-        person.study();
-        person.setName("zs");
-        person.setAge(12);
-        Phone phone = new Phone();
-        phone.rom = "1";
-        phone.ram = "1";
-        phone.cpu = "1";
-        person.phone = phone;
-        person.printInfo(phone);
-        System.out.println("年龄是="+person.getAge());
-        System.out.println("名字是="+person.getName());
-        System.out.println(person.getInfo());
-    }
-}

src/main/java/com/sf/javase/day06/person/Phone.java

@@ -1,11 +0,0 @@
-package com.sf.javase.day06.person;
-
-public class Phone {
-   String cpu;
-   String ram;
-   String rom;
-
-   public String getInfo(){
-       return "Phone{cpu="+cpu+",ram="+ram+",rom="+rom+"}";
-   }
-}

src/main/java/com/sf/javase/day07/Animal.java

@@ -1,49 +0,0 @@
-package com.sf.javase.day07;
-
-/**
- * 封装
- * @author Lenovo
- */
-public class Animal {
-    private String name;
-    private int age;
-
-    public Animal() {
-    }
-
-    public Animal(String name, int age) {
-        this.name = name;
-        this.age = age;
-    }
-
-    public String getName() {
-        if(name.equals("zs")){
-            name = "ls";
-        }
-        return name;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
-
-    public int getAge() {
-        return age;
-    }
-
-    public void setAge(int age) {
-        if(age>10){
-           this.age = 10;
-        }else {
-            this.age = age;
-        }
-    }
-
-    @Override
-    public String toString() {
-        return "Animal{" +
-                "name='" + name + '\'' +
-                ", age=" + age +
-                '}';
-    }
-}

src/main/java/com/sf/javase/day07/AnimalTest.java

@@ -1,12 +0,0 @@
-package com.sf.javase.day07;
-
-public class AnimalTest {
-    public static void main(String[] args) {
-        Animal animal = new Animal();
-        animal.setName("zs1");
-        animal.setAge(-1);
-        System.out.println(animal.getName());
-        System.out.println(animal.getAge());
-        System.out.println(animal);
-    }
-}

src/main/java/com/sf/javase/day07/Student.java

@@ -1,57 +0,0 @@
-package com.sf.javase.day07;
-
-
-
-public class Student {
-    String name;
-    int age;
-    String school;
-    String major;
-
-    public Student() {
-    }
-
-    public Student(String school, String major) {
-        this.school = school;
-        this.major = major;
-    }
-
-    public Student(String name, int age, String school, String major) {
-        this.name = name;
-        this.age = age;
-        this.school = school;
-        this.major = major;
-    }
-
-    public Student(String name ){
-        this.name = name;
-    }
-    public Student(String name , int age){
-        this.name = name;
-        this.age = age;
-    }
-
-    public Student(String name , int age,String school){
-        this(name,age);
-        this.school = school;
-    }
-
-
-
-    @Override
-    public String toString() {
-        return "Student{" +
-                "name='" + name + '\'' +
-                ", age=" + age +
-                ", school='" + school + '\'' +
-                ", major='" + major + '\'' +
-                '}';
-    }
-
-    public static void main(String[] args) {
-        Student student = new Student("zs");
-        System.out.println(student);
-        Student student1 = new Student("zs",12,"理工","计算机");
-        System.out.println(student1);
-    }
-}

src/main/java/com/sf/javase/day07/T.java

@@ -1,56 +0,0 @@
-package com.sf.javase.day07;
-
-public class T {
-    int id;
-    String name;
-    double salary;
-    /**
-     * 构造器   m没有返回值（X  VOID）
-     *  类中没有构造器时（有参和无参都没有） ， 不影响创建对象  系统会默认生成一个无参构造器
-     *  注意 ： 如果当前类中包含有参构造器  ，但没有创建无参构造器   系统不会默认生成无参构造器
-     * 语法结构：
-     * 权限修饰符（ T） 类名(){
-     *
-     * }
-     * 作用： 对象的创建   属性的赋值
-     *
-     * 一个标准的javabean  : 属性   行为（构造器（有，无），toString，set  get ）
-     */
-
-    public T(){}
-
-    public T(int id){
-        this.id = id;
-    }
-    public T(String name){
-        this.name = name;
-    }
-    public T(String name,int id){
-        this.id = id;
-        this.name = name;
-    }
-
-//    public T(String name,int id,int salary){
-//        this.id = id;
-//        this.salary = salary;
-//        this.name = name;
-//    }
-    public T(String name,int id,int salary){
-        this(name,id);
-        this.salary = salary;
-    }
-
-
-
-
-
-
-
-    public static void main(String[] args) {
-        System.out.println("===");
-        T t = new T(1);
-    }
-
-
-
-}

src/main/java/com/sf/javase/day07/extend/Cat.java

@@ -1,50 +0,0 @@
-package com.sf.javase.day07.extend;
-
-public class Cat {
-    private String name;
-    private Integer id;
-
-    public Cat() {
-    }
-
-    public Cat(String name, Integer id) {
-        this.name = name;
-        this.id = id;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
-
-    public Integer getId() {
-        return id;
-    }
-
-    public void setId(Integer id) {
-        this.id = id;
-    }
-
-    public void catchMouse(){
-        System.out.println("捉老鼠");
-    }
-
-    public void eat(){
-        System.out.println("吃");
-    }
-
-    public void sleep(){
-        System.out.println("睡");
-    }
-
-    @Override
-    public String toString() {
-        return "Cat{" +
-                "name='" + name + '\'' +
-                ", id=" + id +
-                '}';
-    }
-}

src/main/java/com/sf/javase/day07/extend/Dog.java

@@ -1,50 +0,0 @@
-package com.sf.javase.day07.extend;
-
-public class Dog {
-    private String name;
-    private Integer id;
-
-    public Dog(String name, Integer id) {
-        this.name = name;
-        this.id = id;
-    }
-
-    public Dog() {
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
-
-    public Integer getId() {
-        return id;
-    }
-
-    public void setId(Integer id) {
-        this.id = id;
-    }
-
-    @Override
-    public String toString() {
-        return "Dog{" +
-                "name='" + name + '\'' +
-                ", id=" + id +
-                '}';
-    }
-
-    public void dd(){
-        System.out.println("打洞");
-    }
-
-    public void eat(){
-        System.out.println("吃");
-    }
-
-    public void sleep(){
-        System.out.println("睡");
-    }
-}

src/main/java/com/sf/javase/day07/extend/entend1/Animal.java

@@ -1,46 +0,0 @@
-package com.sf.javase.day07.extend.entend1;
-
-public class Animal {
-    private String name;
-    private Integer id;
-
-    public Animal() {
-    }
-
-    public Animal(String name, Integer id) {
-        this.name = name;
-        this.id = id;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
-
-    public Integer getId() {
-        return id;
-    }
-
-    public void setId(Integer id) {
-        this.id = id;
-    }
-
-    public void eat(){
-        System.out.println("吃");
-    }
-
-    public void sleep(){
-        System.out.println("睡");
-    }
-
-    @Override
-    public String toString() {
-        return "Animal{" +
-                "name='" + name + '\'' +
-                ", id=" + id +
-                '}';
-    }
-}

src/main/java/com/sf/javase/day07/extend/entend1/Cat.java

@@ -1,32 +0,0 @@
-package com.sf.javase.day07.extend.entend1;
-
-/**
- * 子类   继承  extends 父类 （成员 ）
- */
-public class Cat extends Animal{
-
-
-    public void catchMouse(){
-        System.out.println("小猫抓老鼠");
-    }
-
-
-    public static void main(String[] args) {
-        Cat cat = new Cat();
-        cat.setId(1);
-        cat.setName("xiaomao");
-        cat.catchMouse();
-        cat.sleep();
-        cat.eat();
-    }
-
-    @Override
-    public void eat(){
-        System.out.println("小猫吃");
-    }
-
-    @Override
-    public void sleep() {
-        System.out.println("小猫在休息");
-    }
-}

src/main/java/com/sf/javase/day07/extend/entend1/Dog.java

@@ -1,28 +0,0 @@
-package com.sf.javase.day07.extend.entend1;
-
-public class Dog extends Animal{
-    public void dd(){
-        System.out.println("小狗打洞");
-    }
-
-
-    @Override
-    public void eat() {
-        super.eat();
-    }
-
-
-    @Override
-    public void sleep() {
-        super.sleep();
-    }
-
-    public static void main(String[] args) {
-        Dog dog = new Dog();
-        dog.setId(1);
-        dog.setName("ahuang");
-        dog.eat();
-        dog.sleep();
-        dog.dd();
-    }
-}

src/main/java/com/sf/javase/day07/extend/entend1/T.java

@@ -1,15 +0,0 @@
-package com.sf.javase.day07.extend.entend1;
-
-import java.util.Arrays;
-import java.util.Scanner;
-
-public class T {
-    public static void main(String[] args) {
-        Scanner scanner = new Scanner(System.in);
-        int[] ints = new int[scanner.nextInt()];
-        for (int i= 0;i<ints.length;i++){
-            ints[i] = scanner.nextInt();
-        }
-        System.out.println(Arrays.toString(ints));
-    }
-}

src/main/java/com/sf/javase/day07/homework/Book.java

@@ -1,96 +0,0 @@
-package com.sf.javase.day07.homework;
-
-import java.util.Arrays;
-
-public class Book {
-    //书名
-    private String bookName;
-    //作者
-    private String author;
-    //出版社
-    private String publisher;
-    //价格
-    private double price;
-
-    public Book() {
-    }
-
-    public Book(String bookName, String author, String publisher, double price) {
-        if(price <10){
-            price = 10;
-            System.out.println("温馨提升 价格必须大于10元");
-        }
-        this.bookName = bookName;
-        this.author = author;
-        this.publisher = publisher;
-        this.price = price;
-    }
-
-    public String getBookName() {
-        return bookName;
-    }
-
-    public void setBookName(String bookName) {
-        this.bookName = bookName;
-    }
-
-    public String getAuthor() {
-        return author;
-    }
-
-    public void setAuthor(String author) {
-        this.author = author;
-    }
-
-    public String getPublisher() {
-        return publisher;
-    }
-
-    public void setPublisher(String publisher) {
-        this.publisher = publisher;
-    }
-
-    public double getPrice() {
-        return price;
-    }
-
-    public void setPrice(double price) {
-        if(price < 10){
-            this.price = 10;
-            System.out.println("温馨提升 价格必须大于10元");
-        }else this.price = price;
-    }
-
-    @Override
-    public String toString() {
-        return "Book{" +
-                "bookName='" + bookName + '\'' +
-                ", author='" + author + '\'' +
-                ", publisher='" + publisher + '\'' +
-                ", price=" + price +
-                '}';
-    }
-
-    public static void main(String[] args) {
-//        Book book = new Book();
-//        book.setBookName("java");
-//        book.setAuthor("xxx");
-//        book.setPublisher("xxxx");
-//        book.setPrice(2.3);
-//        System.out.println(book);
-
-//        //通过构造器进行赋值
-//        Book book = new Book("java","xxx","xxxxx",2.3);
-//        System.out.println(book);
-
-        Book[] books = new Book[3];
-        books[0] = new Book("java1","xxx","xxxxx",2.3);
-        books[1] = new Book("java2","xxx","xxxxx",2.3);
-        books[2] = new Book("java3","xxx","xxxxx",2.3);
-        for (Book book : books) {
-            book.setPrice(12);
-        }
-
-        System.out.println(Arrays.toString(books));
-    }
-}

src/main/java/com/sf/javase/day07/homework/CreditCard.java

@@ -1,70 +0,0 @@
-package com.sf.javase.day07.homework;
-
-public class CreditCard extends DepositCard{
-    private Double maxDraft;//本月可透支总额度
-    private Double overDraft;// 本月已透支的额度
-
-
-    @Override
-    public void withdraw(double money) {
-        if(money > (getBalance()+maxDraft-overDraft)){
-            System.out.println("超出透支额度");
-            return;
-        }
-        if (money <= getBalance()){  //不需要透支
-            super.withdraw(money);
-            return;
-        }
-        if(money > getBalance() &&money <= (getBalance()+maxDraft-overDraft)){
-            overDraft += money - getBalance();
-            setBalance(0.0);
-            return;
-        }
-    }
-
-    @Override
-    public void save(double money) {
-        if(money < 0){
-            System.out.println("存款金额不能为负数");
-            return;
-        }else if(money <= overDraft){
-            overDraft -= money;
-        } else {
-            setBalance(money-overDraft);
-            overDraft = 0.0;
-        }
-    }
-
-    public CreditCard() {
-    }
-
-    public CreditCard(Double maxDraft, Double overDraft) {
-        this.maxDraft = maxDraft;
-        this.overDraft = overDraft;
-    }
-
-    public Double getMaxDraft() {
-        return maxDraft;
-    }
-
-    public void setMaxDraft(Double maxDraft) {
-        this.maxDraft = maxDraft;
-    }
-
-    public Double getOverDraft() {
-        return overDraft;
-    }
-
-    public void setOverDraft(Double overDraft) {
-        this.overDraft = overDraft;
-    }
-
-    @Override
-    public String toString() {
-        return "CreditCard{" +
-                "maxDraft=" + maxDraft +
-                ", overDraft=" + overDraft +
-                "余额"+getBalance()+
-                '}';
-    }
-}

src/main/java/com/sf/javase/day07/homework/DepositCard.java

@@ -1,74 +0,0 @@
-package com.sf.javase.day07.homework;
-
-import java.text.BreakIterator;
-
-/**
- * 这是储蓄卡的类
- */
-public class DepositCard {
-    private String id;//账户
-    private Double balance;  //余额
-
-    public void withdraw(double money){
-        if(money < 0){
-            System.out.println("提示取款金额不能为负数");
-            return;
-        }
-        if(money > balance){
-            System.out.println("否则提示余额不足");
-            return;
-        }
-        balance -= money;
-    }
-
-    public void save(double money){
-        if(money < 0){
-            System.out.println("存款不能为负数");
-            return;
-        }
-        balance += money;
-    }
-
-    public String getInfo(){
-        return "DepositCard{" +
-                "id='" + id + '\'' +
-                ", balance=" + balance +
-                '}';
-    }
-
-
-
-
-
-    public DepositCard() {
-    }
-
-    public DepositCard(String id, Double balance) {
-        this.id = id;
-        this.balance = balance;
-    }
-
-    public String getId() {
-        return id;
-    }
-
-    public void setId(String id) {
-        this.id = id;
-    }
-
-    public Double getBalance() {
-        return balance;
-    }
-
-    public void setBalance(Double balance) {
-        this.balance = balance;
-    }
-
-    @Override
-    public String toString() {
-        return "DepositCard{" +
-                "id='" + id + '\'' +
-                ", balance=" + balance +
-                '}';
-    }
-}

src/main/java/com/sf/javase/day07/homework/HomeTest.java

@@ -1,83 +0,0 @@
-package com.sf.javase.day07.homework;
-
-import org.junit.jupiter.api.Test;
-
-/**
- * 作业
- */
-public class HomeTest {
-    @Test
-    public void t1(){
-/**
- * 声明一个数组工具类ArrayTools，包含如下方法：
- * int sum(int[] arr)：求所有元素总和
- * int max(int[] arr)：求所有元素的最大值
- * int indexOf(int[] arr, int value)：查找value在arr数组中第一次出现的下标，如果不存在返回-1
- * int lastIndexOf(int[] arr, int value)：查找value在arr数组中最后一次出现的下标，如果不存在返回-1
- */
-    }
-
-
-    @Test
-    public void t2(){
-
-        /**
-         * int binarySearch(int[] arr, int value)：使用二分查找法在arr数组中查找value的下标，如果value不存在，就返
-         * 回-1，如果数组arr不是有序的，结果将不一定正确
-         * int binarySearch(char[] arr, char value)：使用二分查找法在arr数组中查找value的下标，如果value不存在，就返
-         * 回-1，如果数组arr不是有序的，结果将不一定正确
-         * int binarySearch(double[] arr, double value)：使用二分查找法在arr数组中查找value的下标，如果value不存在，就
-         * 返回-1，如果数组arr不是有序的，结果将不一定正确
-         * void sort(int[] arr)：可以给arr数组从小到大排序，用冒泡排序实现
-         * void sort(char[] arr)：可以给arr数组从小到大排序，用冒泡排序实现
-         * void sort(double[] arr)：可以给arr数组从小到大排序，用冒泡排序实现
-         * String toString(int[] arr)：将元素拼接为"{元素1，元素2，......}"的字符串返回。
-         * String toString(double[] arr)：将元素拼接为"{元素1，元素2，......}"的字符串返回。
-         * String toString(char[] arr)：将元素拼接为"{元素1，元素2，......}"的字符串返回。
-         */
-
-        int[] arr = {1,2,3,4,5,6,9,7,8,12};
-        String s = HomeTest.toString(arr);
-        System.out.println(s);
-
-    }
-
-
-    public static   String toString( int[] arr){
-        //[ 1,2,3,4,5,6,9,7,8,12     ]
-        String str = "[";
-//        int[] arr = {1,2,3,4,5,6,9,7,8,12};
-        for (int i = 0;i< arr.length;i++){
-        if(i<arr.length-1){  //有元素
-            str += arr[i]+",";
-        }else {
-            str += arr[i];  //最后一个元素
-        }
-        }
-        str += "]";
-        return str;
-    }
-
-    @Test
-    public void t3(){
-        /**
-         * 用递归实现不死神兔：故事得从西元1202年说起，话说有一位意大利青年，名叫斐波那契。
-         * 在他的一部著作中提出了一个有趣的问题：假设一对刚出生的小兔一个月后就能长成大兔，
-         * 再过一个月就能生下一对小兔，并且此后每个月都生一对小兔，没有发生死亡，
-         * 问：现有一对刚出生的兔子2年后(24个月)会有多少对兔子?
-         *
-         * 1 1 2 3 5 8 13  21 34
-         */
-        int f = HomeTest.f(24);
-        System.out.println(f);
-    }
-
-    public static int f(int n){
-        if(n <= 2){
-            return 1;
-        }
-        return f(n-1)+f(n-2);
-    }
-
-
-}

src/main/java/com/sf/javase/day07/homework/Test.java

@@ -1,33 +0,0 @@
-package com.sf.javase.day07.homework;
-
-public class Test {
-    public static void main(String[] args) {
-//        DepositCard depositCard = new DepositCard("1",1000.0);
-//        System.out.println(depositCard);
-//        depositCard.withdraw(200.0);
-//        System.out.println(depositCard);
-//        depositCard.withdraw(900.0);
-//        System.out.println(depositCard);
-
-
-        CreditCard creditCard = new CreditCard();
-        creditCard.setMaxDraft(1000.0);
-        creditCard.setOverDraft(0.0);
-        creditCard.setBalance(1000.0);
-        System.out.println(creditCard);
-
-        creditCard.withdraw(200.0);
-        System.out.println(creditCard);
-        creditCard.withdraw(900.0);
-        System.out.println(creditCard);
-        creditCard.withdraw(200.0);
-        System.out.println(creditCard);
-        creditCard.save(200);
-        System.out.println(creditCard);
-        creditCard.save(200);
-        System.out.println(creditCard);
-        creditCard.withdraw(1200);
-        System.out.println(creditCard);
-
-    }
-}

src/main/java/com/sf/javase/day07/homework/Triangle.java

@@ -1,66 +0,0 @@
-package com.sf.javase.day07.homework;
-
-public class Triangle {
-    /**
-     * 声明一个三角形类Triangle，包含属性：a,b,c，都是double类型，表示三条边，包含几个方法：
-     * boolean isTriangle()：判断是否是一个三角形
-     * boolean isRightTriangle()：判断是否是一个直角三角形
-     * boolean isIsoscelesTriangle()：判断是否是一个等腰三角形
-     * boolean isEquilateralTriangle()：判断是否是一个等边三角形
-     * double area()：根据三条边，用海伦公式求面积
-     * double perimeter()：求周长
-     */
-
-    double a;
-    double b;
-    double c;
-
-    /**
-     *  boolean isTriangle()：判断是否是一个三角形
-     */
-    public boolean  isTriangle(){
-        return a>0&&b>0&&c>0&&a+b>c&&a+c>b&&b+c>a;
-    }
-
-    /**
-     * boolean isRightTriangle()：判断是否是一个直角三角形
-     */
-    public boolean isRightTriangle(){
-        return isTriangle()&&(a*a+b*b==c*c  || a*a+c*c==b*b  ||a*a==b*b+c*c);
-    }
-
-    /**
-     * boolean isIsoscelesTriangle()：判断是否是一个等腰三角形
-     */
-
-    public boolean isIsoscelesTriangle(){
-        return isTriangle()&&(a==b ||b==c ||a==c);
-    }
-
-    /**
-     * 等边三角形
-     * @return
-     */
-    public boolean isEquilateralTriangle(){
-        return isTriangle()&&(a==b && b==c && a==c);
-    }
-
-    /**
-     * double perimeter()：求周长
-     */
-    public double perimeter(){
-        if(isTriangle()){
-            return a+b+c;
-        }else return 0.0;
-    }
-
-    /**
-     * double area()：根据三条边，用海伦公式求面积
-     */
-    public double area(){
-        if(isTriangle()){
-            double perimeter = (a+b+c)/2;
-            return Math.sqrt(perimeter*(perimeter-a)*(perimeter-b)*(perimeter-c));//求平方根
-        }else return 0.0;
-    }
-}

src/main/java/com/sf/javase/day07/homework/User.java

@@ -1,38 +0,0 @@
-package com.sf.javase.day07.homework;
-
-public class User {
-    private String userName;
-    private String password;
-
-    public User() {
-    }
-
-    public User(String userName, String password) {
-        this.userName = userName;
-        this.password = password;
-    }
-
-    public String getUserName() {
-        return userName;
-    }
-
-    public void setUserName(String userName) {
-        this.userName = userName;
-    }
-
-    public String getPassword() {
-        return password;
-    }
-
-    public void setPassword(String password) {
-        this.password = password;
-    }
-
-    @Override
-    public String toString() {
-        return "User{" +
-                "userName='" + userName + '\'' +
-                ", password='" + password + '\'' +
-                '}';
-    }
-}

src/main/java/com/sf/javase/day07/homework/UserManager.java

@@ -1,21 +0,0 @@
-package com.sf.javase.day07.homework;
-
-public class UserManager {
-
-    public boolean login( String username , String password ){
-        User user = new User();
-        user.setUserName("admin");
-        user.setPassword("123456");
-        System.out.println(user);
-        if(user.getUserName().equals(username) && user.getPassword().equals(password)){
-            return true;
-        }
-        return false;
-    }
-
-    public static void main(String[] args) {
-        UserManager userManager = new UserManager();
-        boolean admin = userManager.login("admi1n", "123456");
-        System.out.println(admin);
-    }
-}

src/main/java/com/sf/javase/day08/City.java

@@ -1,28 +0,0 @@
-package com.sf.javase.day08;
-
-public class City extends Country{
-    String name = "shanghai属性";   //cityName  cName   countryName
-    public void print(){
-        name = "shanghai";
-        super.print(); //父类
-        System.out.println(this.name);
-        System.out.println(super.name);
-    }
-
-
-    @Override
-    public void instanceMethod() {
-        super.instanceMethod();
-    }
-
-
-
-    public static void staticMethod(){
-
-    }
-
-    public static void main(String[] args) {
-        City city = new City();
-        city.print();
-    }
-}

src/main/java/com/sf/javase/day08/Country.java

@@ -1,18 +0,0 @@
-package com.sf.javase.day08;
-
-public class Country {
-    String name = "china属性";
-
-    public void print(){
-        name = "china方法";
-    }
-
-    public void instanceMethod(){
-
-    }
-
-    public static void staticMethod(){
-
-    }
-
-}

src/main/java/com/sf/javase/day08/Student.java

@@ -1,38 +0,0 @@
-package com.sf.javase.day08;
-
-public class Student {
-
-      String name;
-      int  age;
-      static  String major;
-
-    public Student() {
-    }
-
-    public Student(String name, int age) {
-        this.name = name;
-        this.age = age;
-    }
-
-    @Override
-    public String toString() {
-        return "Student{" +
-                "name='" + name + '\'' +
-                ", age=" + age +
-                '}';
-    }
-
-    public static void main(String[] args) {
-        Student student = new Student("zs",16);
-//        Student.major = "java";
-        student.major = "java";
-        System.out.println(student);
-        System.out.println(student.major);
-
-        Student student1 = new Student();
-        System.out.println(student1);
-        student.major = "java1";
-        System.out.println(student1.major);
-
-    }
-}

src/main/java/com/sf/javase/day08/T.java

@@ -1,50 +0,0 @@
-package com.sf.javase.day08;
-
-import org.junit.jupiter.api.Test;
-
-public class T {
-    @Test
-    public void t1(){
-        int n;
-        {
-         n  = 100;
-            System.out.println(n);
-        }
-        System.out.println(n);
-    }
-
-
-    /**
-     * 静态代码块
-     */
-
-    @Test
-    public void t2(){{
-
-        }
-    }
-
-    static String name  ;
-    static {
-         name = "zs";
-        System.out.println(name);
-    }
-
-    public static void main(String[] args) {
-        System.out.println(name);
-        System.out.println("main");
-    }
-
-    /**
-     * 实例代码块
-     */
-    {
-        System.out.println("实例代码块。。。");
-    }
-
-
-
-
-
-
-}

src/main/java/com/sf/javase/day08/T2.java

@@ -1,29 +0,0 @@
-package com.sf.javase.day08;
-
-public class T2 {
-    private int id;
-
-    public T2() {
-        System.out.println("无参构造器");
-    }
-
-    {
-        System.out.println("实例代码块");
-    }
-
-    static {
-        System.out.println("这是静态代码块");
-    }
-
-
-    public T2(int id) {
-        this.id = id;
-    }
-
-    public static void main(String[] args) {
-        T2 t2 = new T2();
-        new T2();
-    }
-
-
-}

src/main/java/com/sf/javase/day08/duotai/Animal.java

@@ -1,46 +0,0 @@
-package com.sf.javase.day08.duotai;
-
-public class Animal {
-    /**
-     * 多态：多种状态    继承或者实现关系
-     */
-
-    private int id;
-    private String name;
-
-    public void sleep(String name){
-        System.out.println(name+"sleeping~");
-    }
-
-    public Animal() {
-    }
-
-    public Animal(int id, String name) {
-        this.id = id;
-        this.name = name;
-    }
-
-    public int getId() {
-        return id;
-    }
-
-    public void setId(int id) {
-        this.id = id;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
-
-    @Override
-    public String toString() {
-        return "Animal{" +
-                "id=" + id +
-                ", name='" + name + '\'' +
-                '}';
-    }
-}

src/main/java/com/sf/javase/day08/duotai/Cat.java

@@ -1,66 +0,0 @@
-package com.sf.javase.day08.duotai;
-
-public class Cat extends Animal{
-    private String color;   //自己独特的属性
-
-    public void catchMouse(){
-        System.out.println("小猫抓老鼠~");
-    }
-
-    public Cat() {
-    }
-
-//    public Cat(int id, String name) {
-//        super(id, name);
-//    }
-
-    public Cat(String color) {
-        this.color = color;
-    }
-
-    public String getColor() {
-        return color;
-    }
-
-    public void setColor(String color) {
-        this.color = color;
-    }
-
-    @Override
-    public void sleep(String name) {
-        System.out.println("小猫正在睡觉");
-    }
-
-    @Override
-    public String toString() {
-        return "Cat{" +
-                "color='" + color + '\'' +
-                '}';
-    }
-
-    public static void main(String[] args) {
-        Cat cat = new Cat();
-        cat.setColor("黄色");
-        cat.catchMouse();
-        cat.setName("小猫");
-        Dog dog = new Dog();
-        dog.setXX("XX");
-        dog.shut();
-        dog.setName("小狗");
-        //父类的引用   =  子类的对象   = 多态
-        //编译看左边   运行看右边
-       Animal animal = new Dog();
-       animal.setName("12");
-       Animal animal1 = new Cat();
-       animal.setName("小狗");
-       if(animal instanceof Dog){
-           Dog d1 = (Dog) animal;
-           d1.setXX("321");
-           d1.shut();
-       }
-
-
-
-
-    }
-}

src/main/java/com/sf/javase/day08/duotai/Dog.java

@@ -1,35 +0,0 @@
-package com.sf.javase.day08.duotai;
-
-public class Dog extends Animal{
-    private String XX;
-    public void shut(){
-        System.out.println("小狗自己的属性+叫");
-    }
-
-    @Override
-    public void sleep(String name) {
-        System.out.println("小狗正在睡觉");
-    }
-
-    public Dog() {
-    }
-
-    public Dog(String XX) {
-        this.XX = XX;
-    }
-
-    public String getXX() {
-        return XX;
-    }
-
-    public void setXX(String XX) {
-        this.XX = XX;
-    }
-
-    @Override
-    public String toString() {
-        return "Dog{" +
-                "XX='" + XX + '\'' +
-                '}';
-    }
-}

src/main/java/com/sf/javase/day08/duotai/Monkey.java

@@ -1,7 +0,0 @@
-package com.sf.javase.day08.duotai;
-
-public class Monkey extends Animal{
-    public void shut(){
-
-    }
-}

src/main/java/com/sf/javase/day08/duotai/Test09.java

@@ -1,35 +0,0 @@
-package com.sf.javase.day08.duotai;
-
-public class Test09 {
-    public static void main(String[] args) {
-        A a1 = new A();
-        A a2 = new B();
-        B b = new B();
-        C c = new C();
-        D d = new D();
-        System.out.println("(1)" + a1.show(b));   // A and A
-        System.out.println("(2)" + a2.show(d));   // B and A
-        System.out.println("(3)" + b.show(c));    // A and C
-        System.out.println("(4)" + b.show(d));    // B and B
-    }
-}
-class A {
-    public String show(C obj) {
-        return ("A and C");
-    }
-    public String show(A obj) {
-        return "A and A";
-    }
-}
-class B extends A {
-    public String show(B obj) {
-        return "B and B";
-    }
-    public String show(A obj) {
-        return "B and A";
-    }
-}
-class C extends B {
-}
-class D extends B {
-}

src/main/java/com/sf/javase/day08/duotai/Test10.java

@@ -1,14 +0,0 @@
-package com.sf.javase.day08.duotai;
-
-public class Test10 {
-    public static void main(String[] args) {
-        Base b = new Sub(); // 调用成员变量  编译看左边运行看左边
-        System.out.println(b.x);
-    }
-}
-class Base{
-    int x = 1;
-}
-class Sub extends Base{
-    int x = 2;
-}

src/main/java/com/sf/javase/day08/finalP/T.java

@@ -1,29 +0,0 @@
-package com.sf.javase.day08.finalP;
-
-/**
- * final:
- * 被fina修饰的类不能被继承
- * 被final修饰的方法不能被重写
- * 被final修饰的变量不能二次赋值
- */
-public  class T {
-
-    public static   final String IP_ADDRESS = "192.169.1.1";  //常量
-    public void m1(){
-//        IP_ADDRESS = "123"
-       final int a ;
-       a = 1;
-//       a = 1;
-        System.out.println("m1");
-    }
-
-    public final void m2(){
-        System.out.println("m2");
-    }
-
-    public static void m3(){
-        System.out.println("m2");
-
-    }
-
-}

src/main/java/com/sf/javase/day08/finalP/T1.java

@@ -1,20 +0,0 @@
-package com.sf.javase.day08.finalP;
-
-public class T1 extends T{
-
-    @Override
-    public void m1() {
-        super.m1();
-    }
-
-//    @Override
-//    public void m2() {
-//
-//    }
-
-
-//    @Override
-    public static void m3() {
-
-    }
-}

src/main/java/com/sf/javase/day08/homework/Child11.java

@@ -1,59 +0,0 @@
-package com.sf.javase.day08.homework;
-
-public class Child11 extends Father{
-    /**
-     public class Exercise8 {
-     public static void main(String[] args) {
-     new Child("mike");
-     }
-     }
-     class People {
-     private String name;
-     public People() {
-     System.out.print("1");
-     }
-     public People(String name) {
-     System.out.print("2");
-     this.name = name;
-     }
-     }
-     class Child extends People {
-     People father;
-     public Child(String name) {
-     System.out.print("3");
-     father = new People(name + " F");
-     }
-     public Child() {
-     System.out.print("4");
-     }
-     }
-
-
-
-
-     public class Exercise9 {
-     public static void main(String[] args) {
-     Father f = new Father();
-     Child c = new Child();
-     }
-     }
-     class Father {
-     public Father(){
-     System.out.println("father()...");
-     }
-     }
-     class Child extends Father{
-     public Child(){
-     System.out.println("child()...");
-     }
-     }
-     */
-    public Child11(){
-        System.out.println("child()...");
-    }
-
-    public static void main(String[] args) {
-        new Father();
-        new Child11();
-    }
-}

src/main/java/com/sf/javase/day08/homework/Employee.java

@@ -1,118 +0,0 @@
-package com.sf.javase.day08.homework;
-
-import java.util.Arrays;
-import java.util.Scanner;
-
-/**
- * （1）声明员工类Employee，
- * 包含属性：姓名、性别、年龄、工资、电话、邮箱，属性私有化
- * 提供get/set方法
- * ==提供无参构造==
- * ==提供有参构造Employee(String name, char gender, int age, double salary, String phone, String email)==
- * 提供String getInfo()方法
- * （2）在测试类的main中创建员工数组，并从键盘输入员工对象信息，最后遍历输出
- */
-public class Employee {
-    private String name;
-    private char gender;
-    private int age;
-    private double salary;
-    private String phone;
-    private String email;
-
-    public Employee() {
-    }
-
-    public Employee(String name, char gender, int age, double salary, String phone, String email) {
-        this.name = name;
-        this.gender = gender;
-        this.age = age;
-        this.salary = salary;
-        this.phone = phone;
-        this.email = email;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
-
-    public char getGender() {
-        return gender;
-    }
-
-    public void setGender(char gender) {
-        this.gender = gender;
-    }
-
-    public int getAge() {
-        return age;
-    }
-
-    public void setAge(int age) {
-        this.age = age;
-    }
-
-    public double getSalary() {
-        return salary;
-    }
-
-    public void setSalary(double salary) {
-        this.salary = salary;
-    }
-
-    public String getPhone() {
-        return phone;
-    }
-
-    public void setPhone(String phone) {
-        this.phone = phone;
-    }
-
-    public String getEmail() {
-        return email;
-    }
-
-    public void setEmail(String email) {
-        this.email = email;
-    }
-
-    @Override
-    public String toString() {
-        return "Employee{" +
-                "name='" + name + '\'' +
-                ", gender=" + gender +
-                ", age=" + age +
-                ", salary=" + salary +
-                ", phone='" + phone + '\'' +
-                ", email='" + email + '\'' +
-                '}';
-    }
-
-    public static void main(String[] args) {
-      Employee[] employees =  new Employee[3];
-      Scanner scanner = new Scanner(System.in);
-        for (int i = 0; i <3; i++) {
-            System.out.println("这是第"+i+1+"个员工信息：");
-            //姓名、性别、年龄、工资、电话、邮箱
-            System.out.println("姓名");
-            String name = scanner.next();
-            System.out.println("性别");
-            char gender = scanner.next().charAt(0);
-            System.out.println("年龄");
-            int age = scanner.nextInt();
-            System.out.println("工资");
-            double salary = scanner.nextDouble();
-            System.out.println("电话");
-            String phone = scanner.next();
-            System.out.println("邮箱");
-            String email = scanner.next();
-            employees[i] = new Employee(name,gender,age,salary,phone,email);
-        }
-        System.out.println(Arrays.toString(employees));
-        scanner.close();
-    }
-}

src/main/java/com/sf/javase/day08/homework/Father.java

@@ -1,7 +0,0 @@
-package com.sf.javase.day08.homework;
-
-public class Father {
-    public Father(){
-        System.out.println("father()...");
-    }
-}

src/main/java/com/sf/javase/day08/homework/Test.java

@@ -1,10 +0,0 @@
-package com.sf.javase.day08.homework;
-
-public class Test extends TestP{
-    public static void main(String[] args) {
-
-        Test test = new Test();
-        test.setId(1);
-
-    }
-}

src/main/java/com/sf/javase/day08/homework/Test03.java

@@ -1,21 +0,0 @@
-package com.sf.javase.day08.homework;
-
-public class Test03 {
-    public static void main(String[] args) {
-        new A(new B());
-    }
-}
-class A {
-    public A() {
-        System.out.println("A");
-    }
-    public A(B b) {
-        this();
-        System.out.println("AB");
-    }
-}
-class B {
-    public B() {
-        System.out.println("B");
-    }
-}

src/main/java/com/sf/javase/day08/homework/TestP.java

@@ -1,27 +0,0 @@
-package com.sf.javase.day08.homework;
-
-public class TestP {
-    private int id;
-
-    public TestP() {
-    }
-
-    public TestP(int id) {
-        this.id = id;
-    }
-
-    public int getId() {
-        return id;
-    }
-
-    public void setId(int id) {
-        this.id = id;
-    }
-
-    @Override
-    public String toString() {
-        return "TestP{" +
-                "id=" + id +
-                '}';
-    }
-}

src/main/java/com/sf/javase/day09/A1.java

@@ -1,5 +0,0 @@
-package com.sf.javase.day09;
-
-public abstract class A1 {
-    public abstract void A1M1();
-}

src/main/java/com/sf/javase/day09/A2.java

@@ -1,5 +0,0 @@
-package com.sf.javase.day09;
-
-public abstract class A2 extends A1{
-    public abstract void A2M2();
-}

src/main/java/com/sf/javase/day09/A3.java

@@ -1,13 +0,0 @@
-package com.sf.javase.day09;
-
-public class A3 extends A2{
-    @Override
-    public void A1M1() {
-
-    }
-
-    @Override
-    public void A2M2() {
-
-    }
-}

src/main/java/com/sf/javase/day09/Cook.java

@@ -1,13 +0,0 @@
-package com.sf.javase.day09;
-
-public class Cook extends Employee{
-    @Override
-    public void work() {
-        System.out.println("Cook  -- work");
-    }
-
-    @Override
-    public void run() {
-
-    }
-}

src/main/java/com/sf/javase/day09/Employee.java

@@ -1,60 +0,0 @@
-package com.sf.javase.day09;
-
-/**
- * 抽象类
- */
-public abstract class Employee {
-    private String id;
-    private String name;
-    private  double salary;
-
-    public Employee() {
-    }
-
-    public Employee(String id, String name, double salary) {
-        this.id = id;
-        this.name = name;
-        this.salary = salary;
-    }
-
-    public String getId() {
-        return id;
-    }
-
-    public void setId(String id) {
-        this.id = id;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
-
-    public double getSalary() {
-        return salary;
-    }
-
-    public void setSalary(double salary) {
-        this.salary = salary;
-    }
-
-    @Override
-    public String toString() {
-        return "Employee{" +
-                "id='" + id + '\'' +
-                ", name='" + name + '\'' +
-                ", salary=" + salary +
-                '}';
-    }
-
-
-    //定义一个抽象方法
-    public abstract void work();
-    public abstract void run();
-
-//    public  abstract void run1();
-
-}

src/main/java/com/sf/javase/day09/Manager.java

@@ -1,23 +0,0 @@
-package com.sf.javase.day09;
-
-public class Manager extends Employee{
-
-    @Override
-    public void work() {
-        System.out.println("管理其他人");
-        System.out.println("Manager   -- work");
-    }
-
-    @Override
-    public void run() {
-
-    }
-
-    public static void main(String[] args) {
-        Employee employee = new Manager();
-        employee.work();
-        Employee employee1 = new Cook();
-        employee1.work();
-
-    }
-}

src/main/java/com/sf/javase/day09/homework/Exercise28.java

@@ -1,68 +0,0 @@
-package com.sf.javase.day09.homework;
-
-public class Exercise28 {
-    public static void main(String[] args) {
-        Worker w = new Worker();
-        Apple a1 = new Apple(5, "青色");
-        Apple a2 = new Apple(3, "红色");
-        w.pickApple(new CompareBig(), a1, a2);
-        w.pickApple(new CompareColor(), a1, a2);
-    }
-}
-class Apple{
-    private double size;
-    private String color;
-    public Apple(double size, String color) {
-        super();
-        this.size = size;
-        this.color = color;
-    }
-    public Apple() {
-        super();
-    }
-    public double getSize() {
-        return size;
-    }
-    public void setSize(double size) {
-        this.size = size;
-    }
-    public String getColor() {
-        return color;
-    }
-    public void setColor(String color) {
-        this.color = color;
-    }
-    @Override
-    public String toString() {
-        return size + "-" + color;
-    }
-}
-interface CompareAble{
-    default void compare(Apple a1,Apple a2){
-        System.out.println("默认挑大的：");
-        if(a1.getSize() > a2.getSize()){
-            System.out.println(a1);
-        }else{
-            System.out.println(a2);
-        }
-    }
-}
-class CompareBig implements CompareAble{
-}
-class CompareColor implements CompareAble{
-    @Override
-    public void compare(Apple a1, Apple a2) {
-        System.out.println("挑红的：");
-        if("红色".equals(a1.getColor())){
-            System.out.println(a1);
-        }
-        if("红色".equals(a2.getColor())){
-            System.out.println(a2);
-        }
-    }
-}
-class Worker{
-    public void pickApple(CompareAble c,Apple a1,Apple a2){
-        c.compare(a1, a2);
-    }
-}

src/main/java/com/sf/javase/day09/homework/Test07.java

@@ -1,28 +0,0 @@
-package com.sf.javase.day09.homework;
-
-public class Test07 {
-    public static void main(String[] args) {
-        Father f = new Son();
-        System.out.println(f.x);
-    }
-}
-class Father{
-    int x = 10;
-    public Father(){
-        this.print();
-        x = 20;
-    }
-    public void print(){
-        System.out.println("Father.x = " + x);
-    }
-}
-class Son extends Father{
-    int x = 30;
-    public Son(){
-        this.print();
-        x = 40;
-    }
-    public void print(){
-        System.out.println("Son.x = " + x);
-    }
-}

src/main/java/com/sf/javase/day09/homework/lianxi/ShapeInterface.java

@@ -1,14 +0,0 @@
-package com.sf.javase.day09.homework.lianxi;
-
-public interface ShapeInterface {
-
-    // 面积
-    Double getArea();
-    //周长
-    Double getPerimeter();
-
-    String display();
-
-     int compareToArea(ShapeInterface s1 ,ShapeInterface  s2);
-     int compareToPerimeter(ShapeInterface s1 ,ShapeInterface s2);
-}

src/main/java/com/sf/javase/day09/homework/lianxi/impl/Circle.java

@@ -1,31 +0,0 @@
-package com.sf.javase.day09.homework.lianxi.impl;
-
-import com.sf.javase.day09.homework.lianxi.ShapeInterface;
-
-public class Circle implements ShapeInterface {
-    private Double radius;
-    @Override
-    public Double getArea() {
-        return Math.PI*radius*radius;
-    }
-
-    @Override
-    public Double getPerimeter() {
-        return Math.PI*2*radius;
-    }
-
-    @Override
-    public String display() {
-        return null;
-    }
-
-    @Override
-    public int compareToArea(ShapeInterface s1, ShapeInterface s2) {
-        return 0;
-    }
-
-    @Override
-    public int compareToPerimeter(ShapeInterface s1, ShapeInterface s2) {
-        return 0;
-    }
-}

src/main/java/com/sf/javase/day09/homework/lianxi/impl/Rectangle.java

@@ -1,87 +0,0 @@
-package com.sf.javase.day09.homework.lianxi.impl;
-
-import com.sf.javase.day09.homework.lianxi.ShapeInterface;
-
-/**
- * 矩形类
- */
-public class Rectangle implements ShapeInterface {
-    private Double length;  //长
-    private Double wide;  //宽
-
-    public Rectangle() {
-    }
-
-    public Rectangle(Double length, Double wide) {
-        this.length = length;
-        this.wide = wide;
-    }
-
-    public Double getLength() {
-        return length;
-    }
-
-    public void setLength(Double length) {
-        this.length = length;
-    }
-
-    public Double getWide() {
-        return wide;
-    }
-
-    public void setWide(Double wide) {
-        this.wide = wide;
-    }
-
-    @Override
-    public Double getArea() {
-        return length*wide;
-    }
-
-    @Override
-    public Double getPerimeter() {
-        return (wide+length)*2;
-    }
-
-    @Override
-    public String display() {
-        return "周长是 = "+getPerimeter()+", 面积是 = "+getArea();
-    }
-
-    @Override
-    public int compareToArea(ShapeInterface s1, ShapeInterface s2) {
-        if(s1.getArea() > s2.getArea()){
-            System.out.println("第一个面积大于第二个面积");
-            return 1;
-        }else if (s1.getArea() == s2.getArea()){
-            System.out.println("第一个面积等于第二个面积");
-            return 0;
-        }else {
-            System.out.println("第一个面积小于第二个面积");
-            return -1;
-        }
-    }
-
-    @Override
-    public int compareToPerimeter(ShapeInterface s1, ShapeInterface s2) {
-        if(s1.getPerimeter() > s2.getPerimeter()){
-            System.out.println("第一个周长大于第二个周长");
-            return 1;
-        }else if (s1.getPerimeter() == s2.getPerimeter()){
-            System.out.println("第一个周长等于第二个周长");
-            return 0;
-        }else {
-            System.out.println("第一个周长小于第二个周长");
-            return -1;
-        }
-    }
-
-
-    public static void main(String[] args) {
-        ShapeInterface shapeInterface1 = new Rectangle(3.0,4.0);
-        System.out.println(shapeInterface1.display());
-        ShapeInterface shapeInterface2 = new Rectangle(4.0,4.0);
-        shapeInterface1.compareToArea(shapeInterface1,shapeInterface2);
-        shapeInterface1.compareToPerimeter(shapeInterface1,shapeInterface2);
-    }
-}

src/main/java/com/sf/javase/day09/interface1/BuildCarsInterface.java

@@ -1,22 +0,0 @@
-package com.sf.javase.day09.interface1;
-
-public interface BuildCarsInterface {
-
-    //静态常量
-  public static final int MAX_SPEED = 220;//km/h
-
-    int MIN_DISTANCE = 50; //m
-
-    //抽象方法
-   public abstract  void runCar();
-    void breakCar();
-
-    // 默认方法
-    default void start(){
-        System.out.println("default  - 开始");
-    }
-
-    static void show(){
-        System.out.println("static  - show()");
-    }
-}

src/main/java/com/sf/javase/day09/interface1/impl/BuildCarsInterfaceImpl.java

@@ -1,31 +0,0 @@
-package com.sf.javase.day09.interface1.impl;
-
-import com.sf.javase.day09.interface1.BuildCarsInterface;
-
-public class BuildCarsInterfaceImpl implements BuildCarsInterface {
-    @Override
-    public void runCar() {
-        System.out.println("1");
-    }
-
-    @Override
-    public void breakCar() {
-        System.out.println("2");
-    }
-
-
-
-    //default
-//    @Override
-//    public void start() {
-//        BuildCarsInterface.super.start();
-//    }
-
-
-    public static void main(String[] args) {
-        //多态
-      BuildCarsInterface buildCarsInterface =  new BuildCarsInterfaceImpl();
-      buildCarsInterface.start();
-      buildCarsInterface.runCar();
-    }
-}

src/main/java/com/sf/javase/day10/innerclass/InnerclassDemo.java

@@ -1,7 +0,0 @@
-package com.sf.javase.day10.innerclass;
-
-public class InnerclassDemo {
-    public static void main(String[] args) {
-        Outer01.Inner01 dmain = new Outer01.Inner01("dmain");
-    }
-}

src/main/java/com/sf/javase/day10/innerclass/Outer01.java

@@ -1,31 +0,0 @@
-package com.sf.javase.day10.innerclass;
-
-/**
- * 这是外部类
- */
-public class Outer01 {
-    public static String sc_name = "XX程序";
-    private static String name = "XX程序";
-
-    //定义一个内部类（静态）
-    public static class Inner01{
-        private String name;
-
-        public Inner01(String name) {
-            this.name = name;
-        }
-
-        public void showName(){
-            System.out.println(name);
-            System.out.println(sc_name);
-            System.out.println(Outer01.name);
-        }
-    }
-
-    public static void main(String[] args) {
-        // 创建静态内部类对象。
-        // 外部类.内部类  变量 = new  外部类.内部类构造器;
-        Inner01 inner01 = new Inner01("admin");
-        inner01.showName();
-    }
-}

src/main/java/com/sf/javase/day10/innerclass/instanceinnerclass/Outer02.java

@@ -1,43 +0,0 @@
-package com.sf.javase.day10.innerclass.instanceinnerclass;
-
-public class Outer02 {
-    private String out_name = "XXX";
-    private String name = "ww";
-
-    public Outer02() {
-    }
-
-    public Outer02(String out_name) {
-        this.out_name = out_name;
-    }
-
-    public String getOut_name() {
-        return out_name;
-    }
-
-    public void setOut_name(String out_name) {
-        this.out_name = out_name;
-    }
-
-
-    // 成员内部类
-    public class Inner02{
-        private String name;
-
-        public Inner02() {
-        }
-
-        public Inner02(String name) {
-            this.name = name;
-        }
-
-        public void showName(){
-            System.out.println(name);
-            System.out.println(out_name);
-            System.out.println(Outer02.this.name);
-//            Outer02 outer02 = new Outer02();
-//            System.out.println(outer02.name);
-        }
-
-    }
-}

src/main/java/com/sf/javase/day10/innerclass/instanceinnerclass/Outer02Demo.java

@@ -1,9 +0,0 @@
-package com.sf.javase.day10.innerclass.instanceinnerclass;
-
-public class Outer02Demo {
-    public static void main(String[] args) {
-        // 获取内部类  成员
-        Outer02.Inner02 admin = new Outer02().new Inner02("admin");
-        admin.showName();
-    }
-}

src/main/java/com/sf/javase/day10/innerclass/instanceinnerclass/Outer03.java

@@ -1,36 +0,0 @@
-package com.sf.javase.day10.innerclass.instanceinnerclass;
-
-public class Outer03 {
-    private String name = "aaa";
-    private String innerName  ="BB";
-
-    public Outer03() {
-    }
-
-    public Outer03(String name) {
-        this.name = name;
-    }
-
-    public void showName(){
-        class  Inner03{
-            private String innerName = "CCC";
-
-            public Inner03() {
-            }
-
-            public Inner03(String innerName) {
-                this.innerName = innerName;
-            }
-
-            public void t1(){
-                System.out.println(innerName);
-                System.out.println(name);
-                System.out.println(Outer03.this.innerName);
-            }
-        }
-        Inner03 inner03 = new Inner03();
-        inner03.t1();
-    }
-
-
-}

src/main/java/com/sf/javase/day10/innerclass/instanceinnerclass/Outer03Demo.java

@@ -1,8 +0,0 @@
-package com.sf.javase.day10.innerclass.instanceinnerclass;
-
-public class Outer03Demo {
-    public static void main(String[] args) {
-        Outer03 outer03 = new Outer03();
-        outer03.showName();
-    }
-}

src/main/java/com/sf/javase/day10/innerclass/instanceinnerclass/nm1/Demo07.java

@@ -1,21 +0,0 @@
-package com.sf.javase.day10.innerclass.instanceinnerclass.nm1;
-
-public class Demo07 {
-    public static void main(String[] args) {
-        Swim s1 =    new Swim() {
-            @Override
-            public void swimming() {
-                System.out.println("自由泳~");
-            }
-        };
-        s1.swimming();
-
-      Swim s2 =  new Swim() {
-            @Override
-            public void swimming() {
-                System.out.println("111");
-            }
-        };
-      s2.swimming();
-    }
-}

src/main/java/com/sf/javase/day10/innerclass/instanceinnerclass/nm1/Demo8.java

@@ -1,37 +0,0 @@
-package com.sf.javase.day10.innerclass.instanceinnerclass.nm1;
-
-import com.sun.org.apache.bcel.internal.generic.GOTO;
-
-public class Demo8 {
-    public static void main(String[] args) {
-//        Student student = new Student();
-//        goSwimming(student);
-
-
-
-        goSwimming(new Swim() {
-            @Override
-            public void swimming() {
-                System.out.println("22");
-            }
-        });
-
-
-
-
-//      Swim s3 =  new Swim() {
-//            @Override
-//            public void swimming() {
-//                System.out.println("2333");
-//            }
-//        };
-//      goSwimming(s3);
-//    }
-
-    }
-
-    //定义一个方法
-    public static void goSwimming(Swim swim){
-        swim.swimming();
-    }
-}

src/main/java/com/sf/javase/day10/innerclass/instanceinnerclass/nm1/Obj.java

@@ -1,5 +0,0 @@
-package com.sf.javase.day10.innerclass.instanceinnerclass.nm1;
-
-public abstract class Obj {
-     abstract void test();
-}

src/main/java/com/sf/javase/day10/innerclass/instanceinnerclass/nm1/Student.java

@@ -1,13 +0,0 @@
-package com.sf.javase.day10.innerclass.instanceinnerclass.nm1;
-
-public class Student implements Swim{
-    @Override
-    public void swimming() {
-        System.out.println("狗刨式~");
-    }
-
-    public static void main(String[] args) {
-        Swim swim = new Student();
-        swim.swimming();
-    }
-}

src/main/java/com/sf/javase/day10/innerclass/instanceinnerclass/nm1/Swim.java

@@ -1,8 +0,0 @@
-package com.sf.javase.day10.innerclass.instanceinnerclass.nm1;
-
-/**
- * 游泳的接口
- */
-public interface Swim {
-    void swimming();  //抽象方法
-}

src/main/java/com/sf/javase/day10/innerclass/instanceinnerclass/nm1/T1.java

@@ -1,12 +0,0 @@
-package com.sf.javase.day10.innerclass.instanceinnerclass.nm1;
-
-public class T1 {
-    public static void main(String[] args) {
-        new Obj() {
-            @Override
-            void test() {
-                System.out.println("111");
-            }
-        }.test();
-    }
-}

src/main/java/com/sf/javase/day11/api/T.java

@@ -1,115 +0,0 @@
-package com.sf.javase.day11.api;
-
-import org.junit.jupiter.api.Test;
-
-import java.text.ParseException;
-import java.text.SimpleDateFormat;
-import java.util.*;
-
-/**
- * 常用Api练习
- * api   =   Application   program  interface
- */
-public class T {
-    @Test
-    public void t1(){
-        StringBuilder stringBuilder = new StringBuilder();
-        StringBuilder stringBuilder1 = new StringBuilder("qweryi");
-//        StringBuilder delete = stringBuilder1.delete(2, 3);
-        StringBuilder append = stringBuilder.append(stringBuilder1);
-        System.out.println(stringBuilder);
-        System.out.println(stringBuilder1);
-        StringBuilder delete = append.delete(2, 3);
-        System.out.println(delete);
-        System.out.println(stringBuilder);
-        System.out.println(stringBuilder1);
-
-//        System.out.println(delete);
-//        stringBuilder.append("dhyriutyiooi");
-//        System.out.println(stringBuilder);
-//        StringBuilder delete = stringBuilder.delete(2, 4);
-//        System.out.println(delete);
-//        StringBuilder str = stringBuilder.deleteCharAt(2);
-////        System.out.println(str);
-//        StringBuilder a = stringBuilder.replace(2, 8, "AAAAAAAAAAAAAA");
-//        System.out.println(a);
-//        StringBuilder qqq = stringBuilder.insert(1, "QQQ");
-//        System.out.println(qqq);
-//        StringBuilder reverse = qqq.reverse();
-//        System.out.println(reverse);
-    }
-
-    /**
-     * 线程安全
-     *
-     */
-    @Test
-    public void t2(){
-        StringBuffer stringBuffer = new StringBuffer();
-        stringBuffer.append("qwe");
-    }
-
-    /**
-     * 效率测试
-     */
-    @Test
-    public void t3(){
-     long start = 0L;
-     long end  = 0L;
-     String str = "";
-     StringBuffer buffer = new StringBuffer("");
-     StringBuilder builder = new StringBuilder("");
-     //获取当前时间
-        start= System.currentTimeMillis();
-        for (int i = 200000; i > 0; i--) {
-            buffer.append(String.valueOf(i));
-        }
-        end= System.currentTimeMillis();
-        System.out.println("buffer   = "+(end - start));
-
-        start= System.currentTimeMillis();
-        for (int i = 200000; i > 0; i--) {
-            builder.append(String.valueOf(i));
-        }
-        end= System.currentTimeMillis();
-        System.out.println("builder   = "+(end - start));
-
-        start= System.currentTimeMillis();
-        for (int i = 2000; i > 0; i--) {
-           str += String.valueOf(i);
-        }
-        end= System.currentTimeMillis();
-        System.out.println("String   = "+(end - start));
-    }
-
-
-    /**
-     * 时间API
-     */
-    @Test
-    public void t4(){
-        long millis = System.currentTimeMillis();
-        Date date = new Date();
-        System.out.println(date);
-        long millis1 = System.currentTimeMillis();
-        Date date1 = new Date(millis1);
-        System.out.println(date1);
-
-        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH-mm-ss");
-        String dateStr = simpleDateFormat.format(date);
-        System.out.println(dateStr);
-    }
-
-    @Test
-    public void t5() throws ParseException {
-       String str = "2024年07月29日 16时25分04秒";
-        SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日 HH时mm分ss秒");
-        Date parse = sdf.parse(str);
-        System.out.println(parse);
-    }
-
-    @Test
-    public void t6(){
-
-    }
-}

src/main/java/com/sf/javase/day11/exception/ET.java

@@ -1,97 +0,0 @@
-package com.sf.javase.day11.exception;
-
-import org.junit.jupiter.api.Test;
-
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileNotFoundException;
-import java.io.IOException;
-import java.util.Calendar;
-
-/**
- * ET  = ExceptionTest
- * 异常
- */
-public class ET {
-    public static void main(String[] args) {
-//        String[] strs = {"qq","ww","ee"};
-//        String ele = getEle(strs, 3);
-//        System.out.println(ele);
-//        Integer.MAX_VALUE
-
-        int[][] arr = new int[3][1];
-        System.out.println(arr[0].length);
-    }
-
-    //  数组下标越界异常
-    public static String getEle(String[] strs , int index){
-        String str = strs[index];
-        return  str;
-    }
-
-    /**
-     *处理异常：
-     * try{
-     *  //可能要发生的异常代码
-     * }catch(  发生异常的类型1 e ){
-     *  //  处理
-     * }catch(  发生异常的类型2 e ){
-     *     //  处理
-     * }finally{
-     *   关闭资源
-     * }
-     *
-     *
-     * 处理异常的方式：
-     * 1、声明异常  在方法上   throws  异常类型 ...
-     * 2、捕获异常   try {  可能要发生异常的代码}  cathch( 异常的数据类型  变量名  ){  处理方式} finally{  关闭资源（无论异常是否发生  都会执行）
-     *
-     * }
-     * 3、抛出异常  throw   可以结合trycatch用
-     *  throw  new 异常的数据类型(参数)
-     *
-     *  finally ：
-     *      无论是否存在异常都需要执行    进行资源的关闭
-     *     try    -  break(循环)   return       finally 会执行
-     *     1、finally不执行：
-     *      1、System.exit(0);
-     *      2、宕机（意外情况）
-     *
-     *
-     *
-     * 总结：
-     * throw  throws   try{}catch(){}finally{}
-     * 1、什么异常   异常的体系
-     * throwable     error   exception
-     * 受检查异常    运行时异常
-     * 编译时异常（处理）    运行    RuntimeException
-     * io   file  url       arr         by    null     inputmis   inst
-     *
-     * 处理方式   throws    e1,e2
-     * try        自定义异常  throw    runtimeException("....");
-     *
-     * 继承  重写方法     异常   <=  父类方法
-     *
-     */
-    @Test
-    public void t1() throws ClassNotFoundException {
-        try {
-            Class<?> aClass = Class.forName("java.lang.String");
-            FileInputStream fis = new FileInputStream("Java秘籍.txt");
-        } catch (ClassNotFoundException e) {
-            throw new ClassNotFoundException("类找不到异常");
-        } catch (FileNotFoundException e) {
-            String message = e.getMessage();
-            System.out.println(message);
-        } finally {
-            System.out.println("结束");
-        }
-    }
-
-    @Test
-    public void t3(){
-        StringBuilder stringBuilder = new StringBuilder();
-        String s = new String();
-//        stringBuilder.append()
-    }
-}

src/main/java/com/sf/javase/day11/exception/ExceptionTest.java

@@ -1,20 +0,0 @@
-package com.sf.javase.day11.exception;
-
-public class ExceptionTest {
-    public static void main(String[] args) {
-        int result = test();
-        System.out.println(result); //
-    }
-
-    public static int test(){
-        int i = 100;
-        int c = 0;
-        try {
-            c =i+1;
-            return c;
-        } finally {
-//            ci+1 =;
-            return ++c;
-        }
-    }
-}

src/main/java/com/sf/javase/day11/exception/FinallyTest.java

@@ -1,19 +0,0 @@
-package com.sf.javase.day11.exception;
-
-public class FinallyTest {
-    public static void main(String[] args) {
-        int result = test("d");
-        System.out.println(result);
-    }
-    public static int test(String str){
-        try{
-            Integer.parseInt(str);
-            return 1;
-        }catch(NumberFormatException e){
-            return -1;
-        }finally{
-            System.out.println("test结束");
-            return 0;
-        }
-    }
-}

src/main/java/com/sf/javase/day11/exception/MyException.java

@@ -1,12 +0,0 @@
-package com.sf.javase.day11.exception;
-
-public class MyException extends Exception{
-    private  int eid;
-
-    public MyException(String message, int eid) {
-        super(message);
-        this.eid = eid;
-    }
-
-
-}

src/main/java/com/sf/javase/day11/exception/MyExceptionTest.java

@@ -1,20 +0,0 @@
-package com.sf.javase.day11.exception;
-
-public class MyExceptionTest {
-
-    public void  regist(int age) throws MyException {
-        if(age<0){
-            throw new MyException("age<0",1);
-        }else System.out.println("====");
-    }
-
-
-    public void  regist1(int age) throws MyException {
-        try {
-         int c = age;
-        }catch (RuntimeException e){
-            throw new MyException("age<0",2);
-//            ArrayIndexOutOfBoundsException
-        }
-    }
-}

src/main/java/com/sf/javase/day12/T.java

@@ -1,93 +0,0 @@
-package com.sf.javase.day12;
-
-import com.sun.org.apache.xpath.internal.SourceTree;
-import org.junit.jupiter.api.Test;
-import org.omg.CORBA.PUBLIC_MEMBER;
-
-import java.net.SocketTimeoutException;
-import java.time.LocalDate;
-import java.time.LocalDateTime;
-import java.time.LocalTime;
-import java.time.format.DateTimeFormatter;
-import java.time.temporal.TemporalAccessor;
-import java.util.Calendar;
-import java.util.Date;
-import java.util.TimeZone;
-
-/**
- * Api
- */
-public class T {
-    @Test
-    public void t1(){
-        Calendar calendar = Calendar.getInstance();
-        System.out.println(calendar);
-        System.out.println(calendar.get(Calendar.YEAR));
-        System.out.println(calendar.get(Calendar.MONTH));
-        System.out.println(calendar.get(Calendar.DATE));
-        System.out.println(calendar.get(Calendar.HOUR_OF_DAY));
-        System.out.println(calendar.get(Calendar.WEEK_OF_MONTH));
-        System.out.println(calendar.get(Calendar.DAY_OF_MONTH));
-    }
-
-    @Test
-    public void t2(){
-        //获取一个时区
-        TimeZone timeZone = TimeZone.getTimeZone("GMT+8:00");
-        Calendar c = Calendar.getInstance(timeZone);
-        int year = c.get(Calendar.YEAR);
-        int month = c.get(Calendar.MONTH)+1;
-        int day = c.get(Calendar.DATE);
-        int hour = c.get(Calendar.HOUR_OF_DAY);
-        int minute = c.get(Calendar.MINUTE);
-        System.out.println(year + "-" + month + "-" + day + " " + hour + ":" + minute);
-    }
-
-
-    @Test
-    public void t3(){
-        Calendar calendar = Calendar.getInstance();
-        Date date = calendar.getTime();
-        long timeMillis = System.currentTimeMillis();
-        Date date1 = new Date(timeMillis);
-        calendar.setTime(date1);
-        calendar.set(Calendar.DAY_OF_MONTH, 8);
-        System.out.println("当前时间日设置为8后,时间是:" + calendar.getTime());
-        calendar.add(Calendar.HOUR, 2);
-        System.out.println("当前时间加2小时后,时间是:" + calendar.getTime());
-        calendar.add(Calendar.MONTH, -2);
-        System.out.println("当前日期减2个月后,时间是:" + calendar.getTime());
-    }
-
-    @Test
-    public void t4(){
-        LocalDate now = LocalDate.now();
-        System.out.println(now);
-        LocalTime now1 = LocalTime.now();
-        System.out.println(now1);
-        LocalDateTime now2 = LocalDateTime.now();
-        System.out.println(now2);
-        LocalDate of = LocalDate.of(2024, 07, 31);
-        System.out.println(of.getDayOfYear());
-        boolean after = of.isAfter(now);
-        System.out.println(after);
-        boolean before = of.isBefore(now);
-        System.out.println(before);
-    }
-
-    @Test
-    public void t5(){
-//        String property = System.getProperty("java.version");
-//        System.out.println(property);
-        //方式三：自定义的方式（关注、重点）
-        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss");
-        //格式化
-        String strDateTime = dateTimeFormatter.format(LocalDateTime.now());
-        System.out.println(strDateTime); //2022/12/04 21:05:42
-        //解析
-        TemporalAccessor accessor = dateTimeFormatter.parse("2022/12/04 21:05:42");
-        LocalDateTime localDateTime = LocalDateTime.from(accessor);
-        System.out.println(localDateTime); //2022-12-04T21:05:42
-    }
-}
-