/* ITI 1121/1521. Introduction to Computer Science II
 * Assignment/Devoir 3
 *
 * 
 */

public interface Iterator<E> {

    /**
     * Returns true if the iteration has more elements. (In other
     * words, returns true if next would return an element rather than
     * throwing an exception.)
     *
     * @return true if the iterator has more elements.
     */

    public abstract boolean hasNext();

    /**
     * Returns the next element in the interation.
     *
     * @return the next element in the iteration.
     * @exception NoSuchElementException iteration has no more elements.
     */

    public abstract E next();

    /**
     * Removes from the list the last element that was returned by
     * <tt>next</tt>.  This call can only be made once per call to <tt>next</tt>.
     *
     * @exception IllegalStateException if <tt>next</tt> has not been called, or
     *            the number of element removes exceeds the number of time
     *            <tt>next</tt> was called.
     */

    public void remove();

}