import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;

/*
 Method: 

 public static <T> Enumeration<T> enumeration(Collection<T> c)

 Parameters:

 c - the collection for which an enumeration is to be returned.

 Returns:

 an enumeration over the specified collection.

 */

public class CollectionsExample
{

    public static void main(String[] args)
    {

        ArrayList<Integer> arrayList = new ArrayList<Integer>();

        arrayList.add(2000);
        arrayList.add(3000);
        arrayList.add(4000);

        System.out.println("arrayList : " + arrayList + "\n");

        /*
         * Returns an enumeration over the specified collection. 
         * This provides interoperability with legacy APIs that require 
         * an enumeration as input.
         */
        Enumeration<Integer> enumeration = Collections.enumeration(arrayList);

        while (enumeration.hasMoreElements())
        {
            Integer value = enumeration.nextElement();
            System.out.println(value);

        }

    }

}