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

#   
## Introduction

The **`PriorityQueue.size()`** method obtains the number of elements present in the `PriorityQueue`. 

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



## Syntax
The syntax of the `PriorityQueue.size()` function is given below:
```
public int size();
```

## Parameters

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

## Return value
The `PriorityQueue.size()` method returns an integer value that denotes the number of elements in the `PriorityQueue`.

## Code
Let us have a look at the code below.



import java.util.*;
class Main 
{
  public static void main(String[] args)
  {
    PriorityQueue<Integer> pq = new PriorityQueue<Integer>();

    System.out.println("Number of elements in the priority queue are: " + pq.size());

    pq.add(2);
    pq.add(28);
    pq.add(6);
    pq.add(80);
    pq.add(28);
    pq.add(7);
    pq.add(15);
 
    System.out.println("Number of elements in the priority queue are: "+pq.size());
  }
}

#     
## Explanation
* In *line 1*, we import the required package.
* In *line 2*, we make a `Main` class.

* In *line 4*, we make a `main()` function.
* In *line 6*, we declare a `PriorityQueue` that consists of Integer type elements.
* In *line 8*, we print the current number of elements in the priority queue. Here, the output comes to $0$.
* From *lines 10 to 16*, we use the `PriorityQueue.add()` method to insert the elements in the `PriorityQueue`.
* In *line 18*, we use the `PriorityQueue.size()` method to display the number of elements present in the `PriorityQueue`.




What is the PriorityQueue.size() method in Java?

The PriorityQueue.size() method in Java returns the number of elements in the PriorityQueue without accepting parameters.