Open In App

Java HashSet isEmpty() Method

Last Updated : 11 Jul, 2025
Comments
Improve
Suggest changes
Like Article
Like
Report

The HashSet isEmpty() in Java is used to check if the HashSet is empty or not.

Syntax of HashSet isEmpty() Method

boolean isEmpty()

Return Type: This method returns "true" if the HashSet is empty, otherwise returns "false".

Example: This example demonstrates how the isEmpty() method checks whether the given HashSet is empty or not.

Java 
// Java program to demonstrate the working of isEmpty()
import java.util.HashSet;

public class Geeks {
    public static void main(String[] args)
    {
        // Create a new HashSet
        HashSet<String> hs = new HashSet<>();

        System.out.println("HashSet: " + hs);
      
        // Check if the HashSet is empty
        System.out.println("Is the HashSet empty? "
                           + hs.isEmpty());

        // Add elements to the HashSet
        hs.add("Geek1");
        hs.add("Geek2");
        hs.add("Geek3");

        System.out.println("Updated HashSet: " + hs);
      
        // Check again if the HashSet is empty
        System.out.println("Is the HashSet empty? "
                           + hs.isEmpty());
    }
}

Output
HashSet: []
Is the HashSet empty? true
Updated HashSet: [Geek3, Geek2, Geek1]
Is the HashSet empty? false

C
chinmoy lenka
Improve
Article Tags :

Explore

Lightbox