Java Locale setDefault() method

The setDefault() method of Java Locale class is used to set the default locale for this instance of the JVM(Java Virtual Machine). It does not affect the host locale.

Syntax

Parameter

newLocale: It is the new default locale.

Return

Exceptions

SecurityException: This exception will throw if a security manager exists and its checkPermission method doesn't allow the operation.

NullPointerException: This exception will throw if newLocale is null.

Example 1

import java.util.*;
public class LocaleSetDefaultExample1 
{
   public static void main(String[] args) 
   {
	   	// set the default locale
	   	Locale.setDefault(new Locale("en", "US", "WIN"));

	   	// create a locale based on the default settings
	   	Locale locale1 = Locale.getDefault();

	   	// print the new locale
	   	System.out.println("Locale1: " + locale1);
   }
}

Test it Now

Output:

Locale1: en_US_WIN

Example 2

import java.util.*;
public class LocaleSetDefaultExample2 
{
   public static void main(String[] args) 
   {
	   // Use of getDefault() :
       Locale locale1 = Locale.getDefault();
       // print locale1
       System.out.println("Locale1: " + locale1);
       
       // Use of setDefault() :
       locale1.setDefault(new Locale("fr", "FRANCE", "MAC"));

       Locale locale2 = Locale.getDefault();
       System.out.println("NEW Default locale2: " + locale2);
       
       // Use of getDefault() 
       Locale locale3 = Locale.getDefault();
       // print locale3
       System.out.println("Locale3: " + locale3);
       
       // Use of setDefault() 
       locale3.setDefault(new Locale("en", "US", "WIN"));

       Locale locale4 = Locale.getDefault();
       System.out.println("NEW Default locale4: " + locale4);
   }
}

Test it Now

Output:

Locale1: en_US
NEW Default locale2: fr_FRANCE_MAC
Locale3: fr_FRANCE_MAC
NEW Default locale4: en_US_WIN

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Java Locale Class