PriorityQueue peek() in Java

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

Syntax:

K java.util.PriorityQueue.peek()

This method retrieves, but does not remove, 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 PriorityQueuepeek {
    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.peek());

    }
}

Output:

2