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Showing content from https://www.geeksforgeeks.org/java/zoneddatetime-minusweeks-method-in-java-with-examples/ below:

ZonedDateTime minusWeeks() method in Java with Examples

Last Updated : 10 Dec, 2018

minusWeeks()

method of a

ZonedDateTime

class used to subtract the number of weeks from this ZonedDateTime and return a copy of ZonedDateTime after subtraction.This method operates on the local time-line, subtracts weeks to the local date-time and after subtracting weeks 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 minusWeeks(long weeks)

Parameters:

This method accepts a single parameter

weeks

which represents the weeks to subtract, It can be negative.

Return value:

This method returns a

ZonedDateTime

based on this date-time with the weeks subtracted.

Exception:

This method throws

DateTimeException

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

Program 1: Java


 // Java program to demonstrate
// ZonedDateTime.minusWeeks() 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"
                           + " subtracting weeks: "
                           + zoneddatetime);

        // subtract 10 weeks
        ZonedDateTime returnvalue
            = zoneddatetime.minusWeeks(10);

        // print result
        System.out.println("ZonedDateTime after "
                           + "subtracting 10 weeks: "
                           + returnvalue);
    }
}

Output:

ZonedDateTime before subtracting weeks: 2018-12-06T19:21:12.123+05:30[Asia/Calcutta] ZonedDateTime after subtracting 10 weeks: 2018-09-27T19:21:12.123+05:30[Asia/Calcutta]

Program 2: Java


 // Java program to demonstrate
// ZonedDateTime.minusWeeks() 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"
                           + " subtracting weeks: "
                           + zoneddatetime);

        // subtract 2 weeks
        ZonedDateTime returnvalue
            = zoneddatetime.minusWeeks(2);

        // print result
        System.out.println("ZonedDateTime after "
                           + "subtracting 2 weeks: "
                           + returnvalue);
    }
}

Output:

ZonedDateTime before subtracting weeks: 2018-10-25T23:12:31.123+02:00[Europe/Paris] ZonedDateTime after subtracting 2 weeks: 2018-10-11T23:12:31.123+02:00[Europe/Paris]

References: https://docs.oracle.com/javase/10/docs/api/java/time/ZonedDateTime.html#minusWeeks(long)

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