Java.util.Resource Bundle.Control.toResourceName() Method



The java.util.ResourceBundle.Control.toResourceName(String bundleName, String suffix) method converts the given bundleName to the form required by the ClassLoader.getResource method by replacing all occurrences of '.' in bundleName with '/' and appending a '.' and the given file suffix. For example, if bundleName is "" and suffix is "properties", then "foo/bar/" is returned.


Following is the declaration for java.util.Control.toResourceName() method

public final String toResourceName(String bundleName, String suffix)


  • baseName − the bundle name

  • suffix − the file type suffix

Return Value

This method returns the converted resource name


NullPointerException − if bundleName or suffix is null


The following example shows the usage of java.util.ResourceBundle.Control.toResourceName() method.

package com.tutorialspoint;

import java.util.Locale;
import java.util.ResourceBundle;
import java.util.ResourceBundle.Control;

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

      // create a new ResourceBundle.Control with default format
      ResourceBundle.Control rbc = ResourceBundle.Control.getControl(Control.FORMAT_DEFAULT);

      // print the name of the resource
      System.out.println("" + rbc.toResourceName("hello", "properties"));

Assuming we have a resource file 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 −