Important Notice:

Practice-It will be discontinued as of November 1st, 2024. After this date, the website will remain online for a transitional period, but login will be restricted to University of Washington NetID authentication. This marks the next phase towards the platform's full retirement. Thank you for your use and support of the application over the years.

If you are looking for an alternative, a similar tool, CodeStepByStep, was developed independently by the original author of Practice-It, and is available at codestepbystep.com**

logo Practice-It logo

Main Page → Problems → Solve a Problem

ArrayStackIterator

Language/Type: Java collections Iterator
Related Links:
Author: Marty Stepp (on 2013/01/29)

The code below incorrectly implements a private iterator class over an array stack in top-to-bottom order. What is wrong with the code? What changes must be made in order for it to work properly? Assume you are adding your iterator to the following class: 

public class ArrayStack<E> {
    private E[] elements;   // index 0 = bottom;  (size-1) = top
    private int size;
    ...
    // your iterator class goes here
}
Type your solution here:


This is a partial class problem. Submit code that will become part of an existing Java class as described. You do not need to write the complete class, just the portion described in the problem.

You must log in before you can solve this problem.


Log In

If you do not understand how to solve a problem or why your solution doesn't work, please contact your TA or instructor.
If something seems wrong with the site (errors, slow performance, incorrect problems/tests, etc.), please

Is there a problem? Contact a site administrator.