package in.bench.resources.java8.period.duration.examples;

import java.time.LocalDate;
import java.time.Month;
import java.time.Period;

public class FindPeriodBetweenTwoDates {

	public static void main(String[] args) {

		// 1. Joining date
		LocalDate localDate1 = LocalDate.of(2017, Month.MARCH, 6);
		System.out.println("Joining date is :- \n" + localDate1);


		// 2. Relieving date
		LocalDate localDate2 = LocalDate.of(2019, Month.JUNE, 28);
		System.out.println("\nRelieving date is :- \n" + localDate2);


		// 3. difference between 2 LocalDate
		Period period = Period.between(localDate1, localDate2);
		System.out.println("\nDifference between Joining & Relieving Dates is :- \n" 
				+ period);


		// 3.1 get year part
		int years = period.getYears();
		System.out.println("\nYear part from the difference is :- \n" 
				+ years);


		// 3.2 get month part
		int months = period.getMonths();
		System.out.println("\nMonth part from the difference is :- \n"
				+ months);


		// 3.3 get day part
		int days = period.getDays();
		System.out.print("\nDay part from the difference is :- \n" 
				+ days);
	}
}

Joining date is :- 
2017-03-06

Relieving date is :- 
2019-06-28

Difference between Joining & Relieving Dates is :- 
P2Y3M22D

Year part from the difference is :- 
2

Month part from the difference is :- 
3

Day part from the difference is :- 
22

package in.bench.resources.java8.period.duration.examples;

import java.time.Duration;
import java.time.LocalTime;

public class FindDurationBetweenTwoTime {

	public static void main(String[] args) {

		// 1. start time
		LocalTime localTime1 = LocalTime.of(8, 29, 59, 123);
		System.out.println("Start time is :- \n" + localTime1);


		// 2. end time
		LocalTime localTime2 = LocalTime.of(17, 59, 29, 321);
		System.out.println("\nEnd time is :- \n" + localTime2);


		// 3. difference between 2 Time
		Duration duration = Duration.between(localTime1, localTime2);
		System.out.println("\nDifference between Start & End Time is :- \n" 
				+ duration);


		// 3.1 convert Duration difference into seconds leaving nano 
		long seconds = duration.getSeconds();
		System.out.print("\nNumber of Seconds from the difference is :- \n" 
				+ seconds);
	}
}

Start time is :- 
08:29:59.000000123

End time is :- 
17:59:29.000000321

Difference between Start & End Time is :- 
PT9H29M30.000000198S

Number of Seconds from the difference is :- 
34170

package in.bench.resources.java8.period.duration.examples;

import java.time.LocalDateTime;
import java.time.Month;
import java.time.temporal.ChronoUnit;

public class FindDifferenceUsingChronoUnits {

	public static void main(String[] args) {

		// Joining date/time
		LocalDateTime localDateTime1 = LocalDateTime
				.of(2017, Month.MARCH, 6, 8, 29, 59, 123);
		System.out.println("Joining date/time is :- \n" + localDateTime1);


		// Relieving date/time
		LocalDateTime localDateTime2 = LocalDateTime
				.of(2019, Month.JUNE, 28, 17, 59, 29, 321);
		System.out.println("\nRelieving date/time is :- \n" + localDateTime2);


		// 1. difference between 2 LocalDateTime in Years
		long years = ChronoUnit.YEARS.between(localDateTime1, localDateTime2);
		System.out.println("\nDifference in Years is :- \n" + years);


		// 2. difference between 2 LocalDateTime in Months
		long months = ChronoUnit.MONTHS.between(localDateTime1, localDateTime2);
		System.out.println("\nDifference in Months is :- \n" + months);


		// 3. difference between 2 LocalDateTime in Days
		long days = ChronoUnit.DAYS.between(localDateTime1, localDateTime2);
		System.out.println("\nDifference in Days is :- \n" + days);


		// 4. difference between 2 LocalDateTime in Hours
		long hours = ChronoUnit.HOURS.between(localDateTime1, localDateTime2);
		System.out.println("\nDifference in Hours is :- \n" + hours);


		// 5. difference between 2 LocalDateTime in Minutes
		long minutes = ChronoUnit.MINUTES.between(localDateTime1, localDateTime2);
		System.out.println("\nDifference in Minutes is :- \n" + minutes);


		// 6. difference between 2 LocalDateTime in Seconds
		long seconds = ChronoUnit.SECONDS.between(localDateTime1, localDateTime2);
		System.out.println("\nDifference in Seconds is :- \n" + seconds);


		// 7. difference between 2 LocalDateTime in Nanoseconds
		long nanoseconds = ChronoUnit.NANOS.between(localDateTime1, localDateTime2);
		System.out.print("\nDifference in Nanos is :- \n" + nanoseconds);
	}
}

Joining date/time is :- 
2017-03-06T08:29:59.000000123

Relieving date/time is :- 
2019-06-28T17:59:29.000000321

Difference in Years is :- 
2

Difference in Months is :- 
27

Difference in Days is :- 
844

Difference in Hours is :- 
20265

Difference in Minutes is :- 
1215929

Difference in Seconds is :- 
72955770

Difference in Nanos is :- 
72955770000000198