HashSet Class in Java Framework

Example : Program to implement the methods of HashSet Class

import java.util.*;
public class HashSetDemo
{
       public static void main(String args[])
       {
             //creates hashset
             HashSet<String> hs = new HashSet<String>();
             System.out.println("Initional size of LinkedList: "+hs.size());
             System.out.println("HashSet is empty: "+hs.isEmpty());

             //add element in hashset
             hs.add("Red");
             hs.add("Blue");
             hs.add("Pink");
             hs.add("Green");
             hs.add("Pink");
             System.out.println("HashSet elements after adding: "+hs);

             //delete the element
             hs.remove("Green");
             System.out.println("HashSet elements after delete: "+hs);
             System.out.println("HashSet is empty: "+hs.isEmpty());
       }
}