Java.util.ListResourceBundle.getKeys() 方法

package com.codingdict;

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());
      }
   }
}