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Java Source | 1998-03-20 | 2.1 KB | 53 lines |
- /*
- * @(#)ContainerAdapter.java 1.5 98/03/18
- *
- * Copyright 1996, 1997 by Sun Microsystems, Inc.,
- * 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
- * All rights reserved.
- *
- * This software is the confidential and proprietary information
- * of Sun Microsystems, Inc. ("Confidential Information"). You
- * shall not disclose such Confidential Information and shall use
- * it only in accordance with the terms of the license agreement
- * you entered into with Sun.
- */
-
- package java.awt.event;
-
- /**
- * An abstract adapter class for receiving container events.
- * The methods in this class are empty. This class exists as
- * convenience for creating listener objects.
- * <P>
- * Extend this class to create a <code>ContainerEvent</code> listener
- * and override the methods for the events of interest. (If you implement the
- * <code>ContainerListener</code> interface, you have to define all of
- * the methods in it. This abstract class defines null methods for them
- * all, so you can only have to define methods for events you care about.)
- * <P>
- * Create a listener object using the extended class and then register it with
- * a component using the component's <code>addContainerListener</code>
- * method. When the container's contents change because a component has
- * been added or removed, the relevant method in the listener object is invoked,
- * and the <code>ContainerEvent</code> is passed to it.
- *
- * @see ContainerEvent
- * @see ContainerListener
- * @see <a href="http://java.sun.com/docs/books/tutorial/post1.0/ui/containerlistener.html">Tutorial: Writing a Container Listener</a>
- * @see <a href="http://www.awl.com/cp/javaseries/jcl1_2.html">Reference: The Java Class Libraries (update file)</a>
- *
- * @version 1.5 03/18/98
- * @author Amy Fowler
- */
- public abstract class ContainerAdapter implements ContainerListener {
- /**
- * Invoked when a component has been added to the container.
- */
- public void componentAdded(ContainerEvent e) {}
-
- /**
- * Invoked when a component has been removed from the container.
- */
- public void componentRemoved(ContainerEvent e) {}
- }
-