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JDK 1.6
  java.awt.event. ContainerListener View Javadoc
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/*
 * @(#)ContainerListener.java	1.13 06/04/13
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package java.awt.event;

import java.util.EventListener;

/**
 * The listener interface for receiving container events.
 * The class that is interested in processing a container event
 * either implements this interface (and all the methods it
 * contains) or extends the abstract <code>ContainerAdapter</code> class
 * (overriding only the methods of interest).
 * The listener object created from that class is then registered 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.
 * <P>
 * Container events are provided for notification purposes ONLY;
 * The AWT will automatically handle add and remove operations
 * internally so the program works properly regardless of
 * whether the program registers a <code>ComponentListener</code> or not.
 *
 * @see ContainerAdapter
 * @see ContainerEvent
 * @see <a href="http://java.sun.com/docs/books/tutorial/post1.0/ui/containerlistener.html">Tutorial: Writing a Container Listener</a>
 *
 * @author Tim Prinzing
 * @author Amy Fowler
 * @version 1.13 04/13/06
 * @since 1.1
 */
public interface ContainerListener extends EventListener {
    /**
     * 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);

}

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