Retrieve all Hashtable values in Java

This example shows how to get all the elements of the Hashtable in a collection of values Collection belonging to Hashtable using the values() of the Hashtable.

This code retrieves the value collection from Hashtable.

import java.util.Enumeration; 
import java.util.Iterator; 
import java.util.Hashtable; 
import java.util.Collection; 

public class Recovery {

 public static void main(String[] args) {
 
 //create a Hashtable
 Hashtable ht = new Hashtable(); 
 
 //add keys and values
 ht.put("1","one"); 
 ht.put("2","two"); 
 ht.put("3","three"); 
 
 /*
 retrieve all values using
 the values()
 method */
 
 Collection c = ht.values(); 
 
 System.out.println("The values in the Hashtable collection are: "); 
 //iterate through the collection
 Iterator itr = c.iterator(); 
 while(itr.hasNext())
 System.out.println(itr.next()); 
 
 /*
 the resulting collection is a HashTable
 If a value is removed from the collection, it will also be removed
 from the original Hashtable collection. This does not imply adding an element
 */
 
 //removing one from the Hashtable
 c.remove("One"); 
 
 //display all values of Hashtable
 System.out.println("Hashtable after deleting an item"); 
 Enumeration e = ht.elements(); 
 while(e.hasMoreElements())
 System.out.println(e.nextElement()); 
 }
}

Runtime:

The values in the Hashtable collection are: 
three
two
one
Hashtable after deleting an element
three
two
one