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ZonedDateTime plusMonths() method in Java with Examples

ZonedDateTime plusMonths() method in Java with Examples

Last Updated : 10 Dec, 2018

plusMonths()

method of a

ZonedDateTime

class used to add the number of months in this ZonedDateTime and return a copy of ZonedDateTime after addition.This method operates on the local time-line, adds months to the local date-time and after adding months local date-time is converted back to a ZonedDateTime, using the zone ID to obtain the offset. When converting back to ZonedDateTime, if the local date-time is in an overlap, then the offset will be retained if possible, otherwise, the earlier offset will be used. This instance is immutable and unaffected by this method call.

Syntax:
public ZonedDateTime plusMonths(long months)
Parameters:

This method accepts a single parameter

months

which represents the months to add, It can be negative.

Return value:

This method returns a

ZonedDateTime

based on this date-time with the months added.

Exception:

This method throws

DateTimeException

if the result exceeds the supported date range. Below programs illustrate the plusMonths() method:

Program 1: Java
// Java program to demonstrate
// ZonedDateTime.plusMonths() method

import java.time.*;

public class GFG {
    public static void main(String[] args)
    {

        // create a ZonedDateTime object
        ZonedDateTime zoneddatetime
            = ZonedDateTime.parse(
                "2018-12-06T19:21:12.123+05:30[Asia/Calcutta]");

        // print instance
        System.out.println("ZonedDateTime before"
                           + " adding months: "
                           + zoneddatetime);

        // add 3 months
        ZonedDateTime returnvalue
            = zoneddatetime.plusMonths(3);

        // print result
        System.out.println("ZonedDateTime after "
                           + " adding months: "
                           + returnvalue);
    }
}
Output:
ZonedDateTime before adding months: 2018-12-06T19:21:12.123+05:30[Asia/Calcutta]
ZonedDateTime after  adding months: 2019-03-06T19:21:12.123+05:30[Asia/Calcutta]
Program 2: Java
// Java program to demonstrate
// ZonedDateTime.plusMonths() method

import java.time.*;

public class GFG {
    public static void main(String[] args)
    {

        // create a ZonedDateTime object
        ZonedDateTime zoneddatetime
            = ZonedDateTime.parse(
                "2018-10-25T23:12:31.123+02:00[Europe/Paris]");

        // print instance
        System.out.println("ZonedDateTime before"
                           + " adding months: "
                           + zoneddatetime);

        // add 20 months
        ZonedDateTime returnvalue
            = zoneddatetime.plusMonths(20);

        // print result
        System.out.println("ZonedDateTime after "
                           + " adding months: "
                           + returnvalue);
    }
}
Output:
ZonedDateTime before adding months: 2018-10-25T23:12:31.123+02:00[Europe/Paris] ZonedDateTime after adding months: 2020-06-25T23:12:31.123+02:00[Europe/Paris]
Reference: https://docs.oracle.com/javase/10/docs/api/java/time/ZonedDateTime.html#plusMonths(long)

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