// Defines an interface for a list of integers
public interface IntList {
/* interface IntList
 *   add
 *   remove
 *   size
 *   isEmpty
 *   toString? Not necessary since all Objects have toString
 */
    public void add(int value);
    public void remove(int index);
    public int size();
    /* Hunter: This did not work because LinkedIntList doesn't define isEmpty.
     * public boolean isEmpty();
     */
}

/* Hunter: In ArrayIntList.java
 * public class ArrayIntList implements IntList
 */