ZoneOffsetTransitionRule getOffsetBefore() method in Java with Example

The getOffsetBefore() method of java.time.zone.ZoneOffsetTransitionRule class is used to get the object of Zone offset at a particular instant where transition starts.

Syntax:

public ZoneOffset getOffsetBefore()

Parameter: this method does not accept any parameter.

Return Value: This method returns the object of Zone offset at a particular instant where transition starts.

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

Example 1:

// Java program to demonstrate
// getOffsetBefore() 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
        // ZoneOffsetTransitionRule Object
        ZoneOffsetTransitionRule zonetrans1
            = ZoneOffsetTransitionRule
                  .of(
                      Month.JANUARY, 12,
                      DayOfWeek.SUNDAY,
                      LocalTime.of(03, 24, 45),
                      false,
                      ZoneOffsetTransitionRule
                          .TimeDefinition
                          .STANDARD,
                      ZoneOffset.ofTotalSeconds(8),
                      ZoneOffset.ofTotalSeconds(10),
                      ZoneOffset.ofTotalSeconds(12));

        // getting object of Zone offset
        // by using getOffsetBefore() method
        ZoneOffset off
            = zonetrans1.getOffsetBefore();

        // display the result
        System.out.println(
            "Zone Offset before : " + off);
    }
}

Output:

Zone Offset before : +00:00:10

Example 2:

// Java program to demonstrate
// getOffsetBefore() 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
        // ZoneOffsetTransitionRule Object
        ZoneOffsetTransitionRule zonetrans1
            = ZoneOffsetTransitionRule
                  .of(
                      Month.JANUARY, 12,
                      DayOfWeek.SUNDAY,
                      LocalTime.of(03, 24, 45),
                      false,
                      ZoneOffsetTransitionRule
                          .TimeDefinition
                          .STANDARD,
                      ZoneOffset.ofTotalSeconds(8),
                      ZoneOffset.ofTotalSeconds(17),
                      ZoneOffset.ofTotalSeconds(12));

        // getting object of Zone offset
        // by using getOffsetBefore() method
        ZoneOffset off
            = zonetrans1.getOffsetBefore();

        // display the result
        System.out.println(
            "Zone Offset before : " + off);
    }
}

Output:

Zone Offset before : +00:00:17

Reference: https://docs.oracle.com/javase/9/docs/api/java/time/zone/ZoneOffsetTransitionRule.html#getOffsetBefore–