PriorityQueue poll() in Java

poll(): This method is available in java.util.PriorityQueue class of Java.

Syntax:

K java.util.PriorityQueue.poll()

This method retrieves and removes the head of this queue,or returns null if this queue is empty.

Parameters: NA

Returns: the head of this queue, or null if this queue is empty.

Exceptions: NA

Approach

Java

import java.util.PriorityQueue;

public class PriorityQueuepoll {
    public static void main(String[] args) {

        PriorityQueue<Integer> priorityQueue =
                    new PriorityQueue<Integer>();

        priorityQueue.add(12);
        priorityQueue.add(5);
        priorityQueue.add(10);
        priorityQueue.add(2);

        System.out.println(priorityQueue.poll());

    }
}

Output:

2