JAVA EE: How to subtract year, month, day, hours, etc using minus methods of OffsetDateTime Class

Tuesday 6 February 2018

How to subtract year, month, day, hours, etc using minus methods of OffsetDateTime Class

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OffsetDateTimeDemo.java

import java.time.OffsetDateTime;

public class OffsetDateTimeDemo

{

    public static void main(String[] args)

    {

        /*

         * Returns:the current date-time using the system clock, not

         * null.

         */

        OffsetDateTime offsetDateTime1 = OffsetDateTime.now();

        System.out.println(offsetDateTime1);

        OffsetDateTime offsetDateTime2 = offsetDateTime1.minusYears(2);

        System.out.println("\nYear changed          = "+offsetDateTime2);

        OffsetDateTime offsetDateTime3 = offsetDateTime2.minusMonths(3);

        System.out.println("Month changed         = "+offsetDateTime3);

        OffsetDateTime offsetDateTime4 = offsetDateTime3.minusDays(5);

        System.out.println("Day changed           = "+offsetDateTime4);

        OffsetDateTime offsetDateTime5 = offsetDateTime4.minusHours(1);

        System.out.println("Hour changed          = "+offsetDateTime5);

        OffsetDateTime offsetDateTime6 = offsetDateTime5.minusMinutes(10);

        System.out.println("Min changed           = "+offsetDateTime6);

        OffsetDateTime offsetDateTime7 = offsetDateTime6.minusSeconds(20);

        System.out.println("Sec changed           = "+offsetDateTime7);

        OffsetDateTime offsetDateTime8 = offsetDateTime7.minusNanos(50);

        System.out.println("NanoSec changed       = "+offsetDateTime8);

        OffsetDateTime offsetDateTime9 = offsetDateTime8.minusWeeks(3);

        System.out.println("Week changed          = "+offsetDateTime9);

    }

}

Output

2018-01-25T12:48:58.275+05:30

Year changed          = 2016-01-25T12:48:58.275+05:30

Month changed         = 2015-10-25T12:48:58.275+05:30

Day changed           = 2015-10-20T12:48:58.275+05:30

Hour changed          = 2015-10-20T11:48:58.275+05:30

Min changed           = 2015-10-20T11:38:58.275+05:30

Sec changed           = 2015-10-20T11:38:38.275+05:30

NanoSec changed       = 2015-10-20T11:38:38.274999950+05:30

Week changed          = 2015-09-29T11:38:38.274999950+05:30