Getting Keys stored Hashtable using Enumeration

 

import java.util.Enumeration;

import java.util.Hashtable;

public class HashtableKeys {

public static void main(String[] args) {

Hashtable<Integer, String> ht = new Hashtable<>();

ht.put(31, "Vidya");

ht.put(12, "Sambhavna");

ht.put(33, "Tina");

ht.put(45, "Reena");

ht.put(51, "Anmol");

ht.put(16, "Veer");

ht.put(27, "Rekha");

Enumeration enu = ht.keys();

while (enu.hasMoreElements()) {

System.out.println(enu.nextElement());

}

}

}