Java.util.ListResourceBundle.getKeys() Method

Description

The java.util.ListResourceBundle.getKeys() method returns an Enumeration of the keys contained in this ResourceBundle and its parent bundles.

Declaration

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

public Enumeration<String> getKeys()

Parameters

NA

Return Value

This method returns an Enumeration of the keys contained in this ResourceBundle and its parent bundles.

Exception

NA

Example

The following example shows the usage of java.util.ListResourceBundle.getKeys() 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!"}
      };
   }
}

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

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

      // get the keys
      Enumeration<String> enumeration = mr.getKeys();

      // print the keys
      while (enumeration.hasMoreElements()) {
         System.out.println("" + enumeration.nextElement()); 
      }
   }
}

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

hello
goodnight
bye