Searching an element or set of element in another Set using contains() method

 

import java.util.Set;

import java.util.HashSet;

public class SetContains {

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<String> set2 = new HashSet<>();

set2.add("Rehana");

set2.add("Kayra");

set2.add("Gunjan");

set2.add("Ravisha");

System.out.println(set.contains("Kiara"));

System.out.println(set1.contains("Varsha"));

System.out.println(set.containsAll(set1));

System.out.println(set1.containsAll(set2));

}

}