Java.util.PropertyResourceBundle.getKeys() Method

Description

The java.util.PropertyResourceBundle.getKeys() method returns keys of this PropertyResourceBundle and its parent as an Enumeration.

Declaration

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

public Enumeration getKeys()

Parameters

Return Value

This method returns keys of this and its parent bundles.

Exception

Example

The following example shows the usage of java.util.PropertyResourceBundle.getKeys() method.

package com.tutorialspoint;

import java.io.IOException;
import java.io.InputStream;
import java.io.StringBufferInputStream;
import java.util.Enumeration;
import java.util.PropertyResourceBundle;

public class PropertyResourceBundleDemo {
   public static void main(String[] args) {
      // Prepare content for simulating property files
      String fileContent = 
         "# Integer value 1\n" +
         "s1=1\n" +
         "# String value PropertyResourceBundleDemo\n" +
         "s2=PropertyResourceBundleDemo\n" +
         "# Date value Fri Jan 31 00:00:00 IST 3913\n" +
         "s3=Fri Jan 31 00:00:00 IST 3913";
      InputStream propStream = new StringBufferInputStream(fileContent);
      
      try {
         // Create property resource bundle
         PropertyResourceBundle bundle = 
            new PropertyResourceBundle(propStream);
         
         // Get resource keys
         Enumeration keys = bundle.getKeys();
         while(keys.hasMoreElements()) {
            System.out.println("Bundle key: "+keys.nextElement());
         }
      } catch (IOException e) {
         e.printStackTrace();
      }
      
   }

}

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

Bundle key: s2
Bundle key: s1
Bundle key: s3