HashSet add(E e) method in java
import java.util.HashSet; public class HashSetAddMethodExample { public static void main(String[] args) { HashSet<String> hs = new HashSet<String>(); // populating hash set hs.add("violet"); hs.add("indigo"); hs.add("blue"); hs.add("green"); hs.add("yellow"); System.out.println("HashSet of colors: " + hs); } }