Java.util.ListResourceBundle.handleKeySet() Method

Description

The java.util.ListResourceBundle.handleKeySet() method returns a Set of the keys contained only in this ResourceBundle.

Declaration

Following is the declaration for java.util.ListResourceBundle.handleKeySet() method

protected Set<String> handleKeySet()

Parameters

key − the key for the desired object

Return Value

This method returns a Set of the keys contained only in this ResourceBundle

Exception

NA

Example

The following example shows the usage of java.util.ListResourceBundle.handleKeySet() method.

package com.tutorialspoint;

import java.util.*;

// create a class that extends to ListResourceBundle
class MyResources extends ListResourceBundle {

   // get contents must be implemented
   protected Object[][] getContents() {
      return new Object[][] {
         {"hello", "Hello World!"},
         {"bye", "Goodbye World!"},
         {"goodnight", "Goodnight World!"}
      };
   }
   
   protected Set<String> handleKeySet() {
      return new HashSet<String>();
   }
}

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

      // create a new MyResources instance
      MyResources mr = new MyResources();

      // get the object for key hello
      System.out.println("" + mr.getString("hello"));
   }
}

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

Hello World!