JAVA EE: How to add year, month, day, hour etc to the date and time using plus methods of LocalDateTime Class

Wednesday, 24 January 2018

How to add year, month, day, hour etc to the date and time using plus methods of LocalDateTime Class

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LocalDateTimeDemo.java

import java.time.LocalDateTime;

public class LocalDateTimeDemo

{

    public static void main(String[] args)

    {

        LocalDateTime localDateTime1 = LocalDateTime.now();

        System.out.println("Current date and Time = "+localDateTime1);

        LocalDateTime localDateTime2 = localDateTime1.plusYears(2);

        System.out.println("\nYear changed          = "+localDateTime2);

        LocalDateTime localDateTime3 = localDateTime2.plusMonths(3);

        System.out.println("Month changed         = "+localDateTime3);

        LocalDateTime localDateTime4 = localDateTime3.plusDays(5);

        System.out.println("Day changed           = "+localDateTime4);

        LocalDateTime localDateTime5 = localDateTime4.plusHours(1);

        System.out.println("Hour changed          = "+localDateTime5);

        LocalDateTime localDateTime6 = localDateTime5.plusMinutes(10);

        System.out.println("Min changed           = "+localDateTime6);

        LocalDateTime localDateTime7 = localDateTime6.plusSeconds(20);

        System.out.println("Sec changed           = "+localDateTime7);

        LocalDateTime localDateTime8 = localDateTime7.plusNanos(50);

        System.out.println("NanoSec changed       = "+localDateTime8);

        LocalDateTime localDateTime9 = localDateTime8.plusWeeks(3);

        System.out.println("Week changed          = "+localDateTime9);

    }

}

Output

Current date and Time = 2018-01-15T09:07:10.128

Year changed          = 2020-01-15T09:07:10.128

Month changed         = 2020-04-15T09:07:10.128

Day changed           = 2020-04-20T09:07:10.128

Hour changed          = 2020-04-20T10:07:10.128

Min changed           = 2020-04-20T10:17:10.128

Sec changed           = 2020-04-20T10:17:30.128

NanoSec changed       = 2020-04-20T10:17:30.128000050

Week changed          = 2020-05-11T10:17:30.128000050