1 <p> This class implements the <code>java.util.Iterator</code> interface.
2 However, its <code>next()</code> method is not capable of throwing
3 <code>java.util.NoSuchElementException</code>. The <code>next()</code>
4 method should be changed so it throws <code>NoSuchElementException</code>
5 if is called when there are no more elements to return.</p>