Use removeAll() method to get the asymmetric difference of two sets.
First set −
HashSet <String> set1 = new HashSet <String>(); set1.add("Mat"); set1.add("Sat"); set1.add("Cat");
Second set −
HashSet <String> set2 = new HashSet <String>(); set2.add("Mat");
To get the asymmetric difference −
set1.removeAll(set2);
The following is an example that displays how to get the asymmetric difference between two sets −
import java.util.*; public class Demo { public static void main(String args[]) { HashSet <String> set1 = new HashSet <String>(); HashSet <String> set2 = new HashSet <String>(); set1.add("Mat"); set1.add("Sat"); set1.add("Cat"); System.out.println("Set1 = "+ set1); set2.add("Mat"); System.out.println("Set2 = "+ set2); set1.removeAll(set2); System.out.println("Asymmetric difference = "+ set1); } }
Set1 = [Mat, Sat, Cat] Set2 = [Mat] Asymmetric difference = [Sat, Cat]