VIP29/JavaSe01/day04/src/main/java/Test12_Exer2.java

import java.io.IOException;

/**
 * ClassName: Test01
 * Package: PACKAGE_NAME
 * Description:
 *
 * @Author 爱扣钉-陈晨
 * @Create 2023/9/24 8:56
 * @Version 1.0
 */
public class Test12_Exer2 {

    public static void main(String[] args) {
        int[][] arr = {
                {1, 2, 3},
                {4, 5, 6},
                {7, 8, 9}};
        //2层循环
        for (int i = 0; i < arr.length; i++) {
            for (int j = 0; j < arr[i].length; j++) {
                //每个元素
                System.out.print(arr[i][j]+" ");
            }
            System.out.println();
        }


    }

    public static void main1(String[] args) throws InterruptedException, IOException {
        int[][] arr = {
                { 89000 ,110000 ,80000},
                { 78000 ,140000,280000},
                {14500 , 189000 , 220000}
        };

        //第二季度 第二个月
        arr[1][1] = 150000;

        //计算 第三季度  整体销售额 和 平均值
        int[] a = arr[2];
        //和
        int sum = 0;
        for (int i = 0; i < a.length; i++) {
            sum +=a[i];
        }

        System.out.println("和"+sum);
        System.out.println("平均值"+(sum/a.length));
    }

    public static void main2(String[] args) {
        //定义二维数组
        int[][] arr = {{1, 2, 3}, {4, 5, 6}};

        //输出数组中的元素
        System.out.println(arr[0]);
        System.out.println(arr[1]);
        System.out.println(arr);

        System.out.println(arr[0][1]);
        System.out.println(arr[1][1]);

        //修改数组中的元素
        arr[0][1] = 10;
        arr[1][1] = 20;

        //再次输出数组中的元素
        System.out.println(arr[0][1]);
        System.out.println(arr[1][1]);
    }
}