Implementing Ordering in a Hashtable

import java.util.*;


/* 	A class to test the Ordering functionality of OrderedHashtable.java
	Elements retreived from OrderedHashtable are in same order as they
	were put in. This behaviour is not guaranteed in Hashtable.
	@author Animesh Srivastava
*/

public class Test
{
	public static void main(String args[])
	{
		OrderedHashtable aOrdData = new OrderedHashtable();
		Hashtable aHashData = new Hashtable();

		int num=10;

		System.out.println("Putting in "+ num +" values in order 0 to "+num);
		for (int i=0;i<num;i++)
		{
			aHashData.put(new Integer(i),new Integer(i*i));
			aOrdData.put(new Integer(i),new Integer(i*i));
		}


		{
			System.out.println("Retreiving from Hashtable - not guaranteed to be in sequence.");
			Enumeration e = aHashData.keys();
			while(e.hasMoreElements())
				System.out.println(aHashData.get(e.nextElement()));
		}


		{
			System.out.println("Retreiving from OrderedHashtable - guaranteed to be in sequence.");
			Enumeration e = aOrdData.enumerateKeys();
			while(e.hasMoreElements())
				System.out.println(aOrdData.get(e.nextElement()));
		}


	}
}