How to delete all elements from Hashtable

import java.util.Hashtable;

public class HashtableDeleteAll {

    public static void main(String[] args) {
       
        Hashtable<Integer,String> ht = new Hashtable<Integer,String>();
       
        /*
         * Maps the specified key to the specified
         * value in this hashtable
         */
        ht.put(1, "java");
        ht.put(2, "jersey");
        ht.put(3, "spring");
        ht.put(4, "c");
        ht.put(5, "php");
       
        //print hashtable
        System.out.println("Before delete Hash Table is ="+ht);
       
        //Clears this hashtable so that it contains no keys.
        ht.clear();
       
        System.out.println("After delete all element hashtable is = "+ht);
       
         }   
   
}

 Output:

 Before delete Hash Table is ={5=php, 4=c, 3=spring, 2=jersey, 1=java}

After delete all element hashtable is = {}