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Java Locale setDefault() Method with Example

Locale Class setDefault() method: Here, we are going to learn about the setDefault() method of Locale Class with its syntax and example.
Submitted by Preeti Jain, on March 08, 2020

Locale Class setDefault() method

  • setDefault() method is available in java.util package.
  • setDefault() method is used to assign the default locale for this Locale instance of the JVM.
  • setDefault() method is a static method, it is accessible with the class name and if we try to access the method with the class object then we will not get an error.
  • setDefault() method may throw an exception at the time of setting locale.
    • SecurityException: This exception may throw when its checkePermission() method does not permit to operate.
    • NullPointerException: This exception may throw when the given parameter is null exists.


    public static void setDefault(Locale lo);


  • Locale lo – represents the newly assigned default locale.

Return value:

The return type of the method is void, it returns nothing.


// Java program to demonstrate the example 
// of void setDefault(Locale lo) method of Locale 

import java.util.*;

public class SetDefaultOfLocale {
    public static void main(String[] args) {
        // Instantiates Locales
        Locale def = Locale.getDefault();
        Locale set_def = new Locale("jap", "JAPAN");

        // Display Locale
        System.out.println("default locale: " + def);

        // By using setDefault() method is
        // to set the default locale
        System.out.println("Locale.setDefault(set_def): " + Locale.getDefault());


default locale: en_US
Locale.setDefault(set_def): jap_JAPAN


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