import java.text.SimpleDateFormat;

import java.time.Instant;

import java.time.LocalDate;

import java.time.LocalDateTime;

import java.time.LocalTime;

import java.util.Date;

public class DateDemo {

public static void main(String[] args) {

Date date = new Date();

SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");

System.out.println(simpleDateFormat.format(date));

Instant instant = Instant.now();

System.out.println(instant);

Instant instant1 = Instant.ofEpochSecond(20);

System.out.println(instant1);

Instant instant2 = Instant.ofEpochSecond(30, 100);

System.out.println(instant2);

Instant instant3 = Instant.ofEpochMilli(1000);

System.out.println(instant3);

LocalDate localDate = LocalDate.now();

System.out.println(localDate);

LocalDate localDate1 = LocalDate.of(2017, 7, 22);

System.out.println(localDate1);

LocalDate localDate2 = LocalDate.ofYearDay(2018, 100);

System.out.println(localDate2);

LocalDate localDate3 = LocalDate.ofEpochDay(10);

System.out.println(localDate3);

LocalDateTime localDateTime = LocalDateTime.now();

System.out.println(localDateTime);

LocalTime localTime = LocalTime.now();

System.out.println(localTime);

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

}

}