博客

package cn.itcast.extendsTest;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class CalendarTest {
    private final static Date DATE = new Date();

    public static void main(String[] args) throws ParseException {

        System.out.println("Date类输出的日期 : " + DATE);

        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println("SimpleDateFormat格式化后的日期1 : " + simpleDateFormat.format(DATE));

        SimpleDateFormat simpleDateFormat1 = new SimpleDateFormat("yy/MM/dd HH:mm");
        System.out.println("SimpleDateFormat格式化后的日期2 : " + simpleDateFormat1.format(DATE));

        DateFormat df = new SimpleDateFormat("yyyy年MM月dd日");
        String str = "2022年6月6日";
        Date date1 = df.parse(str);
        System.out.println("设定的指定日期：" + date1);

        Calendar calendar = Calendar.getInstance();
        System.out.println("日历类取得的日期：" + calendar.getTime());

        int i = calendar.get(Calendar.MONTH) + 1;
        System.out.println("当前的月份是 = " + i);

        calendar.setTime(DATE);
        System.out.println("从日期类获得的当前日期：" + calendar.getTime());

        calendar.add(Calendar.DAY_OF_MONTH, 3);
        System.out.println("从日期类获得的3天后日期：" + calendar.getTime());
    }
}