/**
 * Specialized Iterator for MyListCollection.
 *
 * @author R. P. Futrelle
 * @version 21 June 2003 (started 21 June 2003)
 */

class MyListIterator implements MyIterator {

    ListCell current;
    MyListCollection _collection;

    MyListIterator(MyListCollection collection) {
	
		_collection = collection;
		current = _collection.top;
    }

	public boolean hasNext() {
		return current != null ;
		} // hasNext()

	public Object next() {
		if (current == null) return null; 
		ListCell cell = current;
		current = cell.next;
		return cell.contents;		
	} // next()

} // MyListIterator