1 /* 2 * Copyright (c) 1996, 2014, 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 6 * under the terms of the GNU General Public License version 2 only, as 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 22 * or visit www.oracle.com if you need additional information or have any 23 * 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 * @author Amy Fowler 35 */ 36 37 public interface ItemSelectable { 38 39 /** 40 * Returns the selected items or {@code null} if no 41 * items are selected. 42 * 43 * @return the list of selected objects, or {@code null} 44 */ getSelectedObjects()45 public Object[] getSelectedObjects(); 46 47 /** 48 * Adds a listener to receive item events when the state of an item is 49 * changed by the user. Item events are not sent when an item's 50 * state is set programmatically. If {@code l} is 51 * {@code null}, no exception is thrown and no action is performed. 52 * 53 * @param l the listener to receive events 54 * @see ItemEvent 55 */ addItemListener(ItemListener l)56 public void addItemListener(ItemListener l); 57 58 /** 59 * Removes an item listener. 60 * If {@code l} is {@code null}, 61 * no exception is thrown and no action is performed. 62 * 63 * @param l the listener being removed 64 * @see ItemEvent 65 */ removeItemListener(ItemListener l)66 public void removeItemListener(ItemListener l); 67 } 68