# 
#     

In this shot, we will learn how to use the `HashSet.size()` method in Java.

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## What is `Hashset.size()`?

The **`Hashset.size()` method** is present in the `HashSet` class inside the `java.util` package.

It is used to obtain the number of elements in the `HashSet` or the size of the `HashSet`.

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## Example

Let’s understand with the help of an example. Suppose that a `HashSet` contains the elements `[1, 8, 5, 3, 0]`. 

The number of elements in the `HashSet` is five. So, the result of the `HashSet.size()` method is `5`.

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#  Parameters

The `HashSet.size()` method does not accept any parameters.

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## Return

The `HashSet.size()` returns the number of elements present or the size of the `HashSet`.

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## Code

Let’s have a look at the code.

import java.io.*;
import java.util.HashSet;

class Main 
{
  public static void main(String args[])
  {
    HashSet<Integer> hash_set = new HashSet<Integer>();

    hash_set.add(1);
    hash_set.add(8);
    hash_set.add(5);
    hash_set.add(3);
    hash_set.add(0);

    System.out.println("The size of HashSet is: " + 
                        hash_set.size());
  }
}

# 
## Explanation

* In lines 1 and 2, we imported the required packages and classes.

* In line 4, we created a `Main` class.

* In line 6, we created a `main()` function.

* In line 8, we declared a `HashSet` of integer type.

* From lines 10 to 14, we added the elements into the `HashSet` by using the `HashSet.add()` method.

* In line 17, we displayed the size of the `HashSet` using `HashSet.size()` function with a message.

This is how the `HashSet.size()` function is used to get the number of elements present in a `HashSet`.

What is the HashSet.size() function in Java?

The HashSet.size() method in Java returns the number of elements in a HashSet.

What is the HashSet.size() function in Java?

What is Hashset.size()?

Example

Parameters

Return

Code

Explanation

What is `Hashset.size()`?