Java tutorial
/* * Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package java.awt.event; import java.util.EventListener; /** * The listener interface for receiving item events. * The class that is interested in processing an item event * implements this interface. The object created with that * class is then registered with a component using the * component's {@code addItemListener} method. When an * item-selection event occurs, the listener object's * {@code itemStateChanged} method is invoked. * * @author Amy Fowler * * @see java.awt.ItemSelectable * @see ItemEvent * @see <a href="https://docs.oracle.com/javase/tutorial/uiswing/events/itemlistener.html">Tutorial: Writing an Item Listener</a> * * @since 1.1 */ public interface ItemListener extends EventListener { /** * Invoked when an item has been selected or deselected by the user. * The code written for this method performs the operations * that need to occur when an item is selected (or deselected). * @param e the event to be processed */ void itemStateChanged(ItemEvent e); }