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Use this interface definition to solve this problem.

public interface QueueADT<E> { /* Set the queue to its initial state. */...

X1003: Remove First Two, Then Add Three

Use this interface definition to solve this problem.

public interface QueueADT<E> {
  /* Set the queue to its initial state. */
  public void clear();

  /* Add an element to the queue (on rear). */
  public boolean enqueue(E it);

  /* Remove the element from front of the queue and
     return it. */
  public E dequeue();

  /* Returns the element from front of the queue without
   * removing it. */
  public E frontValue();

  /* Return the number of elements in the queue. */
  public int numElements();

  /* Is the queue empty? */
  public boolean isEmpty();
}

Write a method to remove the first two elements and add three new elements to a queue. You should check that queue is not null and it has more than 2 elements. Add the following three elements, in this order: "A", "B" and "C". Make sure you use the interface from above.

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