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Java PriorityQueue size() Method with Example

PriorityQueue Class size() method: Here, we are going to learn about the size() method of PriorityQueue Class with its syntax and example.
Submitted by Preeti Jain, on March 11, 2020

PriorityQueue Class size() method

• size() method is available in java.util package.
• size() method is used to return the size (i.e. the number of element exists) of this PriorityQueue.
• size() method is a non-static method, it is accessible with class object only and if we try to access the method with class name then we will get an error.
• size() method does not throw an exception at the time of returning size.

Syntax:

    public int size();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of the method is int, it gets this PriorityQueue size.

Example:

// Java program to demonstrate the example 
// of int size() method of 
// PriorityQueue

import java.util.*;

public class SizeOfPriorityQueue {
    public static void main(String args[]) {
        // Instantiate PriorityQueue
        PriorityQueue < String > pq = new PriorityQueue < String > ();

        // By using add() method is add
        // the given element into priority
        // queue
        pq.add("C");
        pq.add("C++");
        pq.add("JAVA");
        pq.add("PHP");
        pq.add("ANDROID");

        // Display PriorityQueue
        System.out.println("PriorityQueue: " + pq);

        // By using size() method isto
        // return the size of this
        // PriorityQueue
        int size = pq.size();

        // Display size
        System.out.println("pq.size(): " + size);
    }
}

Output

PriorityQueue: [ANDROID, C, JAVA, PHP, C++]
pq.size(): 5