Demonstrate HashSet to Add Element

Here is a Java Program to Demonstrate HashSet.

import java.util.*;

class HashSetDemo {
  public static void main(String args[]) {
    // create a hash set
    HashSet hs = new HashSet();
    
    // add elements to the hash set
    hs.add("B");
    hs.add("A");
    hs.add("D");
    hs.add("E");
    hs.add("C");
    hs.add("F");

    System.out.println(hs);
  }
}

Output of Above Java Program
[D, E, F, A, B, C]