Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://www.tutorialspoint.com/java/util/java_util_dictionary.htm below:

Java Dictionary Class

The Java Dictionary class is the abstract parent of any class, such as Hashtable, which maps keys to values.Following are the important points about Dictionary −

• In this class every key and every value is an object.

• In his class object every key is associated with at most one value.

Following is the declaration for java.util.Dictionary class −

public abstract class Dictionary<K,V>
   extends Object

Dictionary()

This is the single constructor.

This class inherits methods from the following classes −

• java.util.Object

The following example shows the usage of Java Dictionary put(K,V) method. We're creating a dictionary instance using Hashtable object of Integer, Integer. Then we've added few elements to it using put(K,V) method. An enumeration is retrieved using elements() method and enumeration is then iterated to print the elements of the dictionary.

package com.tutorialspoint;

import java.util.Enumeration;
import java.util.Dictionary;
import java.util.Hashtable;

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

      // create a new hashtable
      Dictionary<Integer, Integer> dictionary = new Hashtable<>();

      // add 2 elements
      dictionary.put(1, 1);
      dictionary.put(2, 2);

      Enumeration<Integer> enumeration = dictionary.elements();

      while(enumeration.hasMoreElements()) {
         System.out.println(enumeration.nextElement());
      }
   }
}

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

2
1

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4