How can I optimize a circular queue in Java?

How can I optimize a circular queue in Java?

To optimize a circular queue in Java, you can implement it using an array and maintain two pointers for the front and rear.

What are the advantages of using a circular queue?

Circular queues use space efficiently and allow for constant time complexity for enqueue and dequeue operations.

Can you show me a sample implementation?

Sure! Here's a simple implementation:

class CircularQueue {
    private int[] queue;
    private int front, rear, size;

    public CircularQueue(int capacity) {
        queue = new int[capacity];
        front = size = 0;
        rear = capacity - 1;
    }

    public void enqueue(int item) {
        rear = (rear + 1) % queue.length;
        queue[rear] = item;
        size++;
    }

    public int dequeue() {
        int item = queue[front];
        front = (front + 1) % queue.length;
        size--;
        return item;
    }
}

This code defines a circular queue with basic operations.

How do I handle overflow and underflow in this implementation?

You can handle overflow by checking if the size equals the capacity before enqueueing. For underflow, check if the size is zero before dequeueing.