How do I use queues in Java?

How do I use queues in Java?

You can use the Queue interface in Java, which is part of the java.util package. Would you like to see an example?

Yes, please provide an example of a queue implementation.

Sure! Here's a simple example using LinkedList as a queue:

import java.util.LinkedList;
import java.util.Queue;

public class QueueExample {
    public static void main(String[] args) {
        Queue<Integer> queue = new LinkedList<>();
        queue.add(1);
        queue.add(2);
        queue.add(3);
        System.out.println(queue.poll()); // Outputs 1
        System.out.println(queue.peek()); // Outputs 2
    }
}

What are the main methods of the Queue interface?

The main methods include add(), remove(), peek(), poll(), and offer(). Each serves a different purpose in queue operations.

Can you explain the difference between poll() and remove()?

Yes! poll() retrieves and removes the head of the queue, returning null if the queue is empty, while remove() throws an exception if the queue is empty.