Get Enumeration over HashSet

This java example shows how to get Enumeration over HashSet using enumeration method of Collections class.

import java.util.Collections;
import java.util.Enumeration;
import java.util.HashSet;

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

		/** Create a HashSet object **/
		HashSet< string > hashSet = new HashSet< string >();

		/** Add elements to HashSet **/
		hashSet.add("A");
		hashSet.add("B");
		hashSet.add("D");
		hashSet.add("E");
		hashSet.add("F");

		/**
		 * Enumeration enumeration(Collection c) - Returns an enumeration over
		 * the specified collection. This provides interoperatbility with legacy
		 * APIs that require an enumeration as input.
		 **/

		Enumeration e = Collections.enumeration(hashSet);
		
		System.out.println("The set contains...");
		
		while (e.hasMoreElements())
			System.out.println(e.nextElement());
	}
}

The output is:



The set contains...
D
E
F
A
B