| /* | |
| * Copyright (c) 1998, 2017, 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. | |
| */ | |
| /** | |
| * Allows developers to provide support for undo/redo in applications such as | |
| * text editors. | |
| * <p> | |
| * <strong>Note:</strong> | |
| * Most of the Swing API is <em>not</em> thread safe. For details, see | |
| * <a | |
| * href="https://docs.oracle.com/javase/tutorial/uiswing/concurrency/index.html" | |
| * target="_top">Concurrency in Swing</a>, | |
| * a section in | |
| * <em><a href="https://docs.oracle.com/javase/tutorial/" | |
| * target="_top">The Java Tutorial</a></em>. | |
| * | |
| * <h2>Related Documentation</h2> | |
| * For overviews, tutorials, examples, guides, and tool documentation, | |
| * please see: | |
| * <ul> | |
| * <li><a href="https://docs.oracle.com/javase/tutorial/uiswing/components/generaltext.html#undo" | |
| * target="_top">Implementing Undo and Redo</a>, | |
| * a section in <em>The Java Tutorial</em></li> | |
| * </ul> | |
| * | |
| * @since 1.2 | |
| * @serial exclude | |
| */ | |
| package javax.swing.undo; |