TimeZone getOffset(int, int, int, int, int, int) Method in Java with Examples

The getOffset(int era, int yr, int mon, int day, int dayOfWeek, int millisec) method of TimeZone class in Java is used to know the offset value of this TimeZone at a specific date or modified date in case of daylight savings, from the UTC or the Universal Time Coordinated. This offset value can be added to get the local time.

Syntax:

public abstract int 
    getOffset(int era, int yr, 
              int mon, int day, 
              int dayOfWeek, int millisec)

Parameters: The method can take the below mentioned parameters.

• era: This is of integer type and refers to the era of the given date.
• yr: This is of integer type and refers to the year in the given date.
• month: This is of integer type and refers to the month in the given date.
• day: This is of integer type and refers to the day-in-month of the given date.
• dayOfWeek: This is of integer type and refers to the day-of-week of the given date.
• milliseconds: This is of integer type and refers to the milliseconds in day in standard local time.

Return Value: The method returns the offset value in milliseconds that can be added to GMT to get local time.

Below programs illustrate the working of getOffset() Method of TimeZone:
Example 1:

// Java code to illustrate getOffset() method

import java.util.*;

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

        // Creating a TimeZone
        TimeZone offtime_zone
            = TimeZone.getTimeZone("Europe/Rome");

        // Checking the offset for the systems date
        System.out.println("The Offset Value is:"
                           + offtime_zone.getOffset(
                                 1, 2018, 5, 12, 2, 500));
    }
}

Output:

The Offset Value is:7200000

Example 2:

// Java code to illustrate getOffset() method

import java.util.*;

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

        // Creating a TimeZone
        TimeZone offtime_zone
            = TimeZone.getTimeZone("Pacific/Pago_Pago");

        // Checking the offset for the systems date
        System.out.println("The Offset Value is:"
                           + offtime_zone.getOffset(
                                 1, 1995, 9, 20, 2, 700));
    }
}

Output:

The Offset Value is:-39600000

Reference: https://docs.oracle.com/javase/7/docs/api/java/util/TimeZone.html#getOffset(int, %20int, %20int, %20int, %20int, %20int)