Java Map convert to Hashtable

import java.util.Enumeration;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;

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

    Map<String, String> hMap = new HashMap<String, String>();

    hMap.put("1", "CSS");
    hMap.put("2", "HTML");
    hMap.put("3", "Java");

    Hashtable<String, String> ht = new Hashtable<String, String>();
    ht.put("1", "REPLACED !!");
    ht.put("4", "demo2s.com");

    System.out.println("Hash table");
    Enumeration<String> e = ht.elements();
    while (e.hasMoreElements()){
      System.out.println(e.nextElement());
    }      /*from  w w w.  j  ava  2 s . c  om*/

    ht.putAll(hMap);
    e = ht.elements();
    System.out.println();
    
    System.out.println("Hash table");
    while (e.hasMoreElements()){
      System.out.println(e.nextElement());
    }      
  }
}