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1   /*
2    * Copyright (c) 1996, 2000, Oracle and/or its affiliates. All rights reserved.
3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4    *
5    * This code is free software; you can redistribute it and/or modify it
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7    * published by the Free Software Foundation.  Oracle designates this
8    * particular file as subject to the "Classpath" exception as provided
9    * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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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   * @author Amy Fowler
35   */
36  
37  public interface ItemSelectable {
38  
39      /**
40       * Returns the selected items or <code>null</code> if no
41       * items are selected.
42       */
43      public Object[] getSelectedObjects();
44  
45      /**
46       * Adds a listener to receive item events when the state of an item is
47       * changed by the user. Item events are not sent when an item's
48       * state is set programmatically.  If <code>l</code> is
49       * <code>null</code>, no exception is thrown and no action is performed.
50       *
51       * @param    l the listener to receive events
52       * @see ItemEvent
53       */
54      public void addItemListener(ItemListener l);
55  
56      /**
57       * Removes an item listener.
58       * If <code>l</code> is <code>null</code>,
59       * no exception is thrown and no action is performed.
60       *
61       * @param   l the listener being removed
62       * @see ItemEvent
63       */
64      public void removeItemListener(ItemListener l);
65  }