package api;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.Date;

public class DateDemo01 {

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

System.out.println(System.currentTimeMillis());

System.out.println("----------");

demo01();

System.out.println("-----new date(0l)-----");

demo02();

System.out.println("----getTime------");

demo03();

System.out.println("----Calendar------");

demo04();

System.out.println("----DateFormat------");

demo05();

System.out.println("----Parse------");

demoParse();

}

private static void demoParse() throws ParseException {

SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM-dd HH:mm:ss");

Date dateParse = sdf.parse("2020年10-19 10:09:33");

System.out.println(dateParse);

}

private static void demo05() {

Date date = new Date();

SimpleDateFormat sdf = new SimpleDateFormat("y-M-d k:mm:s");

SimpleDateFormat sdf2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

String formatDate = sdf.format(date);

String formatDate2 = sdf2.format(date);

System.out.println(formatDate);

System.out.println(formatDate2);

}

private static void demo04() {

Date date = new Date();

long times = date.getTime();

System.out.println(times);

int year = Calendar.YEAR;

System.out.println(year);;

}

private static void demo03() {

Date date = new Date();

System.out.println(date.getTime());

System.out.println(new Date(date.getTime()));

}

private static void demo02() {

// 1000 * 60 * 60 * 24 * 365 一年 31536000000

Date date = new Date(31536000000l * 51);

Date date2 = new Date(0l);

System.out.println(date);

System.out.println(date2);

}

private static void demo01() {

Date date = new Date();

System.out.println(date);

System.out.println(date.getYear());

}

}