Calendar日历

package cn.hp.demo01;


import java.time.LocalDate;
import java.time.LocalDateTime;
import java.util.Calendar;
import java.util.Date;


public class Demo03 {
    public static void main(String[] args) {
        //创建日历对象
        Calendar cal = Calendar.getInstance();

        //设置日期
        cal.set(Calendar.MONTH, 9);
        System.out.println("cal = "+cal);
        //获取日期
        System.out.println(cal.get(Calendar.YEAR)+"年");
        System.out.println(cal.get(Calendar.MONTH)+1+"月");
        System.out.println(cal.get(Calendar.DATE)+"日");
        System.out.println(cal.get(Calendar.HOUR_OF_DAY)+"：");
        System.out.println(cal.get(Calendar.MINUTE)+":");
        System.out.println(cal.get(Calendar.SECOND));

        //如何转化为Date
        Date date = cal.getTime();
        System.out.println("date = "+date);

        //获取从1907到现在经过的毫秒数
        System.out.println(cal.get(Calendar.MILLISECOND));


        //新特性，JDK1.8新增的内容
        LocalDate now1 = LocalDate.now();
        System.out.println("now1 = "+now1);
        LocalDateTime now = LocalDateTime.now();
        System.out.println("now = "+now);
    }
}