How do I implement a priority queue in Java?

How do I implement a priority queue in Java?

You can implement a priority queue in Java using the PriorityQueue class from the Java Collections Framework.

Can you show me a simple example of using PriorityQueue?

Sure! Here's a basic example:

import java.util.PriorityQueue;

public class Main {
    public static void main(String[] args) {
        PriorityQueue<Integer> pq = new PriorityQueue<>();
        pq.add(5);
        pq.add(1);
        pq.add(3);

        while (!pq.isEmpty()) {
            System.out.println(pq.poll()); // prints elements in ascending order
        }
    }
}

What are the advantages of using a priority queue?

Priority queues are useful for scheduling tasks, managing resources, and implementing algorithms like Dijkstra's for shortest paths.

Are there any performance considerations I should be aware of?

Yes, the time complexity for adding and removing elements is O(log n), which is efficient, but be mindful of the overhead for large datasets.