/**
 * A collection built on an list and returning a MyIterator subclass.
 *
 * @author R. P. Futrelle
 * @version 20 June 2003 (started 19 June 2003)
 */

class MyListCollection {


	ListCell top, last;
	
	
	// Tested this class using main(), w/o iterator
	
	public static void main(String[] args){

		MyListCollection mine = new MyListCollection();
		mine.add("string1");
		mine.add("string2");
		System.out.println(mine.top.contents);
		System.out.println(mine.top.next.contents);
			
	} // main()
	
    MyListCollection() {
		init();
    }
    
	void init() {
		top = null;
		last = null;
		} // init()
	
    MyIterator iterator() {
		return new MyListIterator(this);
    }	

	boolean add(Object obj) {
		ListCell cell = new ListCell(obj);
		if(top == null) {
			top = cell;
			last = cell; // skip this?
			}
		else last.next = cell;
		last = cell;
		return true;
			}
		
	void clear() {
		init();
		}
				
} // MyListCollection

class ListCell {

	Object contents;
	ListCell next;
	
	ListCell (Object item) {
		contents = item;
		next = null;
		} // ListCell()

} // class List