01 /*
02 * Copyright 1996-2000 Sun Microsystems, Inc. All Rights Reserved.
03 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04 *
05 * This code is free software; you can redistribute it and/or modify it
06 * under the terms of the GNU General Public License version 2 only, as
07 * published by the Free Software Foundation. Sun designates this
08 * particular file as subject to the "Classpath" exception as provided
09 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 package java.awt;
27
28 import java.awt.event.*;
29
30 /**
31 * The interface for objects which contain a set of items for
32 * which zero or more can be selected.
33 *
34 * @version 1.23 05/05/07
35 * @author Amy Fowler
36 */
37
38 public interface ItemSelectable {
39
40 /**
41 * Returns the selected items or <code>null</code> if no
42 * items are selected.
43 */
44 public Object[] getSelectedObjects();
45
46 /**
47 * Adds a listener to receive item events when the state of an item is
48 * changed by the user. Item events are not sent when an item's
49 * state is set programmatically. If <code>l</code> is
50 * <code>null</code>, no exception is thrown and no action is performed.
51 *
52 * @param l the listener to receive events
53 * @see ItemEvent
54 */
55 public void addItemListener(ItemListener l);
56
57 /**
58 * Removes an item listener.
59 * If <code>l</code> is <code>null</code>,
60 * no exception is thrown and no action is performed.
61 *
62 * @param l the listener being removed
63 * @see ItemEvent
64 */
65 public void removeItemListener(ItemListener l);
66 }
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