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

Harsh Jain

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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());  }}
Using the PriorityQueue.size() method in Java

### 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.

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Harsh Jain