In this shot, we will learn how to use the PriorityQueue.size() method in Java.
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.
The syntax of the PriorityQueue.size() function is given below:
public int size();
The PriorityQueue.size() method does not accept any parameters.
The PriorityQueue.size() method returns an integer value that denotes the number of elements in the PriorityQueue.
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());}}
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 .
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.