8.b implement set in java

import java.util.*; 

public class SetExample{ 

    public static void main(String[] args) 

    { 
        Set<String> hash_Set = new HashSet<String>(); 
        hash_Set.add("a"); 
        hash_Set.add("b"); 
        hash_Set.add("c"); 
        hash_Set.add("d"); 
        hash_Set.add("Set"); 
        System.out.println(hash_Set); 

    }