Java Dictionary elements() Method

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Description

The Java Dictionary elements() method returns an enumeration of the values in this dictionary.

Declaration

Following is the declaration for java.util.Dictionary.elements() method

public abstract Enumeration<V> elements()

Parameters

NA

Return Value

This method returns an enumeration of the values in this dictionary.

Exception

NA

Getting Enumeration to Iterate a Dictionary of Integer,Integer Pair Example

The following example shows the usage of Java Dictionary elements() method. We're creating a dictionary instance using Hashtable object of Integer, Integer pairs. Then we've added few elements to it. 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());
      }
   }
}

Output

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

2
1

Getting Enumeration to Iterate a Dictionary of Integer,String Pair Example

The following example shows the usage of Java Dictionary elements() method. We're creating a dictionary instance using Hashtable object of Integer, String pairs. Then we've added few elements to it. 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, String> dictionary = new Hashtable<>();

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

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

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

Output

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

Two
One

Getting Enumeration to Iterate a Dictionary of Integer,Object Pair Example

The following example shows the usage of Java Dictionary elements() method. We're creating a dictionary instance using Hashtable object of Integer, Student pairs. Then we've added few elements to it. 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, Student> dictionary = new Hashtable<>();

      // add 2 elements
      dictionary.put(1, new Student(1, "Julie"));
      dictionary.put(2, new Student(2, "Robert"));

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

      while(enumeration.hasMoreElements()) {
         System.out.println(enumeration.nextElement());
      }
   }
}
class Student {
   int rollNo;
   String name;

   Student(int rollNo, String name){
      this.rollNo = rollNo;
      this.name = name;
   }

   @Override
   public String toString() {
      return "[ " + this.rollNo + ", " + this.name + " ]";
   }
}

Output

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

[ 2, Robert ]
[ 1, Julie ]