J250511/01-JavaSE阶段代码/J20250808/localDateTime/Demo01_LocalDateTimeTest.java

package J20250808.localDateTime;

import java.time.LocalDateTime;

/**
 * @author WanJl
 * @version 1.0
 * @title Demo01_LocalDateTime
 * @description
 * @create 2025/8/8
 */
public class Demo01_LocalDateTimeTest {
    public static void main(String[] args) {
        //获取当前系统的时间
        LocalDateTime now = LocalDateTime.now();
        System.out.println(now);
        //使用指定年月日时分秒初始化一个LocalDateTime对象
        LocalDateTime of = LocalDateTime.of(2000, 2, 22, 22, 22, 22);
        System.out.println(of);

        //获取年 int getYear()
        System.out.println("今年是："+now.getYear());
        //获取月份1-12   int getMonthValue()
        System.out.println("这个月是："+now.getMonthValue());
        //获取月份中的第几天 1~31  int getDayOfMonth()
        System.out.printf("今天是本月中的第%d天\n",now.getDayOfMonth());
        //获取一年中的第几天 1~366 int getDayOfYear()
        System.out.printf("今天是今年中的第%d天\n",now.getDayOfYear());
        //获取星期    DayOfWeek getDayOfWeek()
        System.out.println("今天是"+now.getDayOfWeek());
        //获取小时 getHour()
        System.out.println("小时："+now.getHour());
        //获取分钟 getMinute()
        System.out.println("分钟："+now.getMinute());
        //获取秒 getSecond()
        System.out.println("秒："+now.getSecond());
    }
}