常用类.calendar

package 常用类.calendar;

import java.util.Calendar;

public class demo01 {
    public static void main(String[] args) {
        //1.创建一个Calendar对象
        Calendar calendar=Calendar.getInstance();//构造方法为protected不能直接创建对象，用getInstance();
        System.out.println(calendar.getTime().toLocaleString());
        System.out.println(calendar.getTimeInMillis());
        //2.获取时间信息
        //获取年
        int year=calendar.get(Calendar.YEAR);
        //月 从0-11
        int month=calendar.get(Calendar.MONTH);
        //日
        int day=calendar.get(Calendar.DATE);
        //小时
        int hour=calendar.get(Calendar.HOUR_OF_DAY);//HOUR12小时，HOUR_OF_DAY24小时
        //分钟
        int minute=calendar.get(Calendar.MINUTE);
        //秒
        int second=calendar.get(Calendar.SECOND);

        System.out.println(year+"年"+(month+1)+"月"+day+"日"+hour+"："+minute+"："+second+"秒");

        //修改时间
        Calendar calendar2=Calendar.getInstance();
        calendar2.set(Calendar.DAY_OF_MONTH,5);
        System.out.println(calendar2.getTime().toLocaleString());

        //4.add方法修改时间
        calendar2.add(Calendar.HOUR,1);
        System.out.println(calendar2.getTime().toLocaleString());

        //5.补充方法
        calendar2.add(Calendar.MONTH,1);
        int max=calendar2.getActualMaximum(Calendar.DAY_OF_MONTH);
        int min=calendar2.getActualMinimum(Calendar.DAY_OF_MONTH);
        System.out.println(max);
        System.out.println(min);



    }
}