7.) Priority Queue (basic)

 Write a programme to remove smallest element from queue.

import java.util.PriorityQueue;

public class RemoveSmallestElementFromPriorityQueue {

    public static void main(String[] args) {

        // Create a priority queue

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

        // Add some elements to the priority queue

        pq.add(5);

        pq.add(3);

        pq.add(7);

        pq.add(1);

        pq.add(9);

        // Print the priority queue before removing the smallest element

        System.out.println("Before removing the smallest element: " + pq);

        // Remove the smallest element from the priority queue

        int smallest = pq.poll();

        // Print the smallest element that was removed

        System.out.println("The smallest element that was removed: " + smallest);

        // Print the priority queue after removing the smallest element

        System.out.println("After removing the smallest element: " + pq);

    }

}