/*------------------------------------------------------------------------
 |  Expected Output:
 |
 |  true
 |  0
 |  -1
 |  false
 |  1
 |  a
 |  a
 |  true
 |  0
 |  b        <== Yup, these are the
 |  c        <== only differences
 |  d        <== from StackSec8!
 *------------------------------------------------------------------------*/

    public static void main (String [] args)
    {
        QueueSec9 queue = new QueueSec9();

        System.out.println(queue.isEmpty());       // true
        System.out.println(queue.getOccupancy());  // 0
        System.out.println(queue.peek());          // -1

        queue.enqueue('a');
        System.out.println(queue.isEmpty());       // false
        System.out.println(queue.getOccupancy());  // 1
        System.out.println((char)queue.peek());    // 'a'

        System.out.println((char)queue.dequeue());     // 'a'
        System.out.println(queue.isEmpty());       // true
        System.out.println(queue.getOccupancy());  // 0

        queue.enqueue('b');
        queue.enqueue('c');
        queue.enqueue('d');
        while (!queue.isEmpty()) {
            char ch = (char)queue.dequeue();
            System.out.println(ch);                // b, c, d
        }
    }