public class QueueTester {

    public static void main(String[] args) {
        System.out.println("Queue tester.");

        Queue myQueue = new Queue();

        System.out.println(myQueue.isEmpty());
        System.out.println(myQueue.getCapacity());

        try {
            // System.out.println(myQueue.dequeue());   // Causes underflow exception.

            myQueue.enqueue(1);
            myQueue.enqueue(2);
            myQueue.enqueue(3);
            myQueue.enqueue(4);
            myQueue.enqueue(5);

            // myQueue.enqueue(6);  // Causes overflow exception.

            System.out.println(myQueue.dequeue());
            System.out.println(myQueue.dequeue());
            System.out.println(myQueue.dequeue());
            System.out.println(myQueue.dequeue());
            System.out.println(myQueue.dequeue());

            System.out.println(myQueue.isEmpty());

            myQueue.enqueue(6);
            myQueue.enqueue(7);

            System.out.println(myQueue.dequeue());
            System.out.println(myQueue.dequeue());

        } catch (Exception ex) {
            System.out.println("Caught exception: " + ex.getMessage());
        }
    }
}