/* * Copyright (c) 1997, 2000, 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 javax.swing.text; import java.awt.Component;import javax.swing.event.ChangeListener;import javax.swing.event.ChangeEvent; import java.util.Enumeration;import java.util.Hashtable;   /** * A collection of attributes to associate with an element in a document. * Since these are typically used to associate character and paragraph * styles with the element, operations for this are provided.  Other * customized attributes that get associated with the element will * effectively be name-value pairs that live in a hierarchy and if a name * (key) is not found locally, the request is forwarded to the parent. * Commonly used attributes are separated out to facilitate alternative * implementations that are more efficient. * * @author  Timothy Prinzing */public interface Style extends MutableAttributeSet {     /**     * Fetches the name of the style.   A style is not required to be named,     * so <code>null</code> is returned if there is no name     * associated with the style.     *     * @return the name     */    public String getName();     /**     * Adds a listener to track whenever an attribute     * has been changed.     *     * @param l the change listener     */    public void addChangeListener(ChangeListener l);     /**     * Removes a listener that was tracking attribute changes.     *     * @param l the change listener     */    public void removeChangeListener(ChangeListener l);  }