Java.util.ResourceBundle.getKeys() Method

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Description

The java.util.ResourceBundle.getKeys() method returns an enumeration of the keys.

Declaration

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

public abstract 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.ResourceBundle.getKeys() method.

package com.tutorialspoint;

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

public class ResourceBundleDemo {

   public static void main(String[] args) {

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

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

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

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

   }
}

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!
bye=Goodbye World!
morning=Good Morning World!

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

Hello World!
hello
bye
morning



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