29
30 /**
31 * The listener interface for receiving container events.
32 * The class that is interested in processing a container event
33 * either implements this interface (and all the methods it
34 * contains) or extends the abstract <code>ContainerAdapter</code> class
35 * (overriding only the methods of interest).
36 * The listener object created from that class is then registered with a
37 * component using the component's <code>addContainerListener</code>
38 * method. When the container's contents change because a component
39 * has been added or removed, the relevant method in the listener object
40 * is invoked, and the <code>ContainerEvent</code> is passed to it.
41 * <P>
42 * Container events are provided for notification purposes ONLY;
43 * The AWT will automatically handle add and remove operations
44 * internally so the program works properly regardless of
45 * whether the program registers a {@code ContainerListener} or not.
46 *
47 * @see ContainerAdapter
48 * @see ContainerEvent
49 * @see <a href="http://docs.oracle.com/javase/tutorial/uiswing/events/containerlistener.html">Tutorial: Writing a Container Listener</a>
50 *
51 * @author Tim Prinzing
52 * @author Amy Fowler
53 * @since 1.1
54 */
55 public interface ContainerListener extends EventListener {
56 /**
57 * Invoked when a component has been added to the container.
58 */
59 public void componentAdded(ContainerEvent e);
60
61 /**
62 * Invoked when a component has been removed from the container.
63 */
64 public void componentRemoved(ContainerEvent e);
65
66 }
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29
30 /**
31 * The listener interface for receiving container events.
32 * The class that is interested in processing a container event
33 * either implements this interface (and all the methods it
34 * contains) or extends the abstract <code>ContainerAdapter</code> class
35 * (overriding only the methods of interest).
36 * The listener object created from that class is then registered with a
37 * component using the component's <code>addContainerListener</code>
38 * method. When the container's contents change because a component
39 * has been added or removed, the relevant method in the listener object
40 * is invoked, and the <code>ContainerEvent</code> is passed to it.
41 * <P>
42 * Container events are provided for notification purposes ONLY;
43 * The AWT will automatically handle add and remove operations
44 * internally so the program works properly regardless of
45 * whether the program registers a {@code ContainerListener} or not.
46 *
47 * @see ContainerAdapter
48 * @see ContainerEvent
49 * @see <a href="https://docs.oracle.com/javase/tutorial/uiswing/events/containerlistener.html">Tutorial: Writing a Container Listener</a>
50 *
51 * @author Tim Prinzing
52 * @author Amy Fowler
53 * @since 1.1
54 */
55 public interface ContainerListener extends EventListener {
56 /**
57 * Invoked when a component has been added to the container.
58 */
59 public void componentAdded(ContainerEvent e);
60
61 /**
62 * Invoked when a component has been removed from the container.
63 */
64 public void componentRemoved(ContainerEvent e);
65
66 }
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