Hashtable

Hashtable is a class in Java collections which implements Map interface and extends the Dictionary Class

Contains only unique elements and its synchronized

Hashtable

import java.util.*;
public class HashtableDemo {
   public static void main(String args[]) {
   // create and populate hash table
   Hashtable<Integer, String> map = new Hashtable<Integer, String>();
   map.put(101,"C Language");
   map.put(102, "Domain");
   map.put(104, "Databases");
   System.out.println("Values before remove: "+ map);
   // Remove value for key 102
   map.remove(102);
   System.out.println("Values after remove: "+ map);
   }
}