1 /* 2 * Copyright (c) 1996, 2013, 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.event; 27 28 import java.util.EventListener; 29 30 /** 31 * The listener interface for receiving item events. 32 * The class that is interested in processing an item event 33 * implements this interface. The object created with that 34 * class is then registered with a component using the 35 * component's <code>addItemListener</code> method. When an 36 * item-selection event occurs, the listener object's 37 * <code>itemStateChanged</code> method is invoked. 38 * 39 * @author Amy Fowler 40 * 41 * @see java.awt.ItemSelectable 42 * @see ItemEvent 43 * @see <a href="https://docs.oracle.com/javase/tutorial/uiswing/events/itemlistener.html">Tutorial: Writing an Item Listener</a> 44 * 45 * @since 1.1 46 */ 47 public interface ItemListener extends EventListener { 48 49 /** 50 * Invoked when an item has been selected or deselected by the user. 51 * The code written for this method performs the operations 52 * that need to occur when an item is selected (or deselected). 53 */ itemStateChanged(ItemEvent e)54 void itemStateChanged(ItemEvent e); 55 56 } 57