DateAndTime.java

package com.rajpro;

import java.time.Clock;
import java.time.Duration;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.Month;
import java.time.ZoneId;
import java.time.ZonedDateTime;

public class DateAndTime {
	public static void main(String[] args) {
		System.out.println(" Get the system clock as UTC offset");
		final Clock clock = Clock.systemUTC();
		System.out.println( clock.instant() );
		System.out.println( clock.millis() );
		
		System.out.println(" Get the local date and local time");
		final LocalDate date = LocalDate.now();
		final LocalDate dateFromClock = LocalDate.now( clock );
		System.out.println( date );
		System.out.println( dateFromClock );
		System.out.println(" Get the local date and local time");
		final LocalTime time = LocalTime.now();
		final LocalTime timeFromClock = LocalTime.now( clock );
		System.out.println(time);
		System.out.println( timeFromClock );
		System.out.println(" Get the local date/time");
		final LocalDateTime datetime = LocalDateTime.now();
		final LocalDateTime datetimeFromClock = LocalDateTime.now( clock );
		System.out.println( datetime );
		System.out.println( datetimeFromClock );
		
		System.out.println(" Get the zoned date/time");
		final ZonedDateTime zonedDatetime = ZonedDateTime.now();
		final ZonedDateTime zonedDatetimeFromClock = ZonedDateTime.now( clock );
		final ZonedDateTime zonedDatetimeFromZone = ZonedDateTime.now( ZoneId.of( "America/Los_Angeles" ));
		System.out.println( zonedDatetime );
		System.out.println( zonedDatetimeFromClock );
		System.out.println( zonedDatetimeFromZone );
		
		
		System.out.println(" Get duration between two dates");
		final LocalDateTime from = LocalDateTime.of( 2014, Month.APRIL, 16, 0, 0, 0 );
		final LocalDateTime to = LocalDateTime.of( 2015, Month.APRIL, 16, 23, 59, 59 );
		final Duration duration = Duration.between( from, to );
		System.out.println( "Duration in days: " + duration.toDays() );
		System.out.println( "Duration in hours: " + duration.toHours() );
	}
}