// $Id: CounterObserver.java,v 1.2 2004/04/04 10:15:39 dan Exp $

package ps4;

/**
 * A <code>CounterObserver</code> is an observer that receives
 * <code>increment</code> messages. (Part of an implementation of
 * the observer design pattern.)
 *
 * @author <a href="mailto:drkp@mit.edu">Dan R. K. Ports</a>
 * @version 1.0
 */
public interface CounterObserver
{
    /**
     * Increment the counter
     *
     */
    public void increment();
}