Retaining all element from one a set to another set

 

import java.util.Set;

import java.util.HashSet;

public class SetRetains {

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");

set.retainAll(set1);

System.out.println(set);

System.out.println(set1);

}

}