Java HashSet size() Method (original) (raw)

Last Updated : 23 Jan, 2025

The HashSet **size() method in Java is used to get the size of the HashSet or the number of elements present in the HashSet.

Syntax of HashSet size() Method

int size()

**Return Type: This method returns an integer value that represents the number of elements currently stored in the HashSet.

**Example: This example **demonstrates the size of a HashSet.

Java `

// Java program to demonstrates the working of size() import java.util.HashSet;

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

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

    System.out.println("HashSet: " + hs);
  
    // print the size of the HashSet
    System.out.println("Size of HashSet: " + hs.size());

    // Add element in the HashSet
    hs.add("Geek4");

    System.out.println("Updated HashSet: " + hs);

    // print the size of the updated HashSet
    System.out.println("Size of Updated HashSet: "
                       + hs.size());

    hs.remove("Geek1");
    hs.remove("Geek3");
  
    System.out.println("HashSet after removal of elements: " + hs);

    // print the size of the HashSet after removal
    System.out.println("Size of HashSet after removal: "
                       + hs.size());
}

}

`

**Output: