ZoneOffsetTransition isValidOffset() method in Java with Example

The isValidOffset() method of java.time.zone.ZoneOffsetTransition class is used to check if the particular zone offset is valid or not during the transition.

Syntax:

public boolean isValidOffset(ZoneOffset offset)

Parameter: this method used to take type of zone offset object as a parameter.

Return Value: This method returns true if the particular zone offset is valid or not during the transition otherwise false.

Below are the examples to illustrate the isValidOffset() method:

Example 1:

// Java program to demonstrate
// isValidOffset() method

import java.util.*;
import java.io.*;
import java.time.*;
import java.time.chrono.*;
import java.time.zone.*;

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

        // creating and initializing
        // the object of LocalDateTime
        LocalDateTime loc
            = LocalDateTime.of(
                1999, 04, 25,
                03, 24, 59, 0);

        // creating and initializing
        // the object of ZoneOffset
        ZoneOffset off1
            = ZoneOffset.ofTotalSeconds(8);

        // creating and initializing
        // the object of ZoneOffset
        ZoneOffset off2
            = ZoneOffset.ofTotalSeconds(12);

        // creating and initializing
        // ZoneOffsetTransition Object
        ZoneOffsetTransition zonetrans1
            = ZoneOffsetTransition.of(
                loc, off1, off2);

        // comparing both object using
        // isValidOffset() method
        boolean status
            = zonetrans1
                  .isValidOffset(
                      ZoneOffset
                          .ofTotalSeconds(24));

        // display the result
        if (status)
            System.out.println("zoneoffset is valid");
        else
            System.out.println("zoneoffset is invalid");
    }
}

Output:

zoneoffset is invalid

Example 2:

// Java program to demonstrate
// isValidOffset() method

import java.util.*;
import java.io.*;
import java.time.*;
import java.time.chrono.*;
import java.time.zone.*;

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

        // creating and initializing
        // the object of LocalDateTime
        LocalDateTime loc
            = LocalDateTime.of(
                1999, 04, 25,
                03, 24, 59, 0);

        // creating and initializing
        // the object of ZoneOffset
        ZoneOffset off1
            = ZoneOffset.ofHoursMinutes(0, 8);

        // creating and initializing
        // the object of ZoneOffset
        ZoneOffset off2
            = ZoneOffset.ofTotalSeconds(12);

        // creating and initializing
        // ZoneOffsetTransition Object
        ZoneOffsetTransition zonetrans1
            = ZoneOffsetTransition.of(
                loc, off1, off2);

        // comparing both object using
        // isValidOffset() method
        boolean status
            = zonetrans1.isValidOffset(off1);

        // display the result
        if (status)
            System.out.println("zoneoffset is valid");
        else
            System.out.println("zoneoffset is invalid");
    }
}

Output:

zoneoffset is valid

Output:

zoneoffset is valid

Reference: https://docs.oracle.com/javase/9/docs/api/java/time/zone/ZoneOffsetTransition.html#isValidOffset-java.time.ZoneOffset-