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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

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="https://docs.oracle.com/javase/tutorial/uiswing/events/containerlistener.html">Tutorial: Writing a Container Listener</a>

 *

 * @author Amy Fowler

 * @since 1.1

 */

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) {}

}