Removing elements from a HashSet using different methods

import java.util.Set;

import java.util.HashSet;

public class SetRemove {

public static void main(String[] args) {

// creating our set

// set internally uses hashmap

Set<String> set = new HashSet<>();

// adding element to our set

set.add("Gunjan");

set.add("Rehana");

set.add("Kiara");

set.add("Kayra");

set.add("Varsha");

set.add("Sayra");

set.add("Rehana");

Set<String> set1 = new HashSet<>();

set1.add("Rehana");

set1.add("Kayra");

set1.add("Gunjan");

System.out.println("Before invoking remove() method the set is");

System.out.println(set);

set.remove("Varsha");

System.out.println("After invoking remove() method the set is");

System.out.println(set);

// set.clear();

System.out.println("After invoking remove clear() the set is");

System.out.println(set);

System.out.println("After invoking addAll() method");

set.removeAll(set1);

System.out.println(set);

System.out.println(set1);

}

}