Java Program to create a new hash set

import java.util.*;
public class demo1 
{
 public static void main(String[] args)
 {
     HashSet<String> hash_set = new HashSet<String>();
     hash_set.add("C#");
     hash_set.add("C++");
     hash_set.add("Java");
     hash_set.add("Python");
     hash_set.add("Perl");
     hash_set.add("Ruby");

   System.out.println("The Hash Set: " + hash_set);
   }
}