Java ResourceBundle handleGetObject() Method

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Description

The Java ResourceBundle handleGetObject(String key) method gets an object for the given key from this resource bundle. Returns null if this resource bundle does not contain an object for the given key.

Declaration

Following is the declaration for java.util.ResourceBundle.handleGetObject() method

protected abstract Object handleGetObject(String key)

Parameters

key − the key for the desired object

Return Value

This method returns the object for the given key, or null

Exception

NullPointerException − if key is null

Using handleGetObject method of ResourceBundle Example

The following example shows the usage of Java ResourceBundle handleGetObject() method. In this example, we've extended ResourceBundle Class and implemented handleKeySet() method and getting a set of Keys as a HashSet.

package com.tutorialspoint;

import java.util.Enumeration;
import java.util.Locale;
import java.util.ResourceBundle;
import java.util.StringTokenizer;

public class ResourceBundleDemo extends ResourceBundle {

   @Override
   public Object handleGetObject(String key) {
      if (key.equals("hello")) {
         return "Hello World!";
      } else {
         return null;
      }
   }
   
   @Override
   public Enumeration getKeys() {
      StringTokenizer key = new StringTokenizer("Hello World!");
      return key;
   }
   
   public static void main(String[] args) {

      // create a new ResourceBundle with specified locale
      ResourceBundle bundle = ResourceBundle.getBundle("hello", Locale.US);

      // print the string array assigned to key "hello"
      System.out.println("" + bundle.getString("hello"));   
   }
}

Output

Assuming we have a resource file hello_en_US.properties available in your CLASSPATH, with the following content. This file will be used as an input for our example program −

hello = Hello World!

Let us compile and run the above program, this will produce the following result −

Hello World!