/* * Copyright (c) 1997, 1999, 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.accessibility; /** * The AccessibleValue interface should be supported by any object * that supports a numerical value (e.g., a scroll bar).  This interface * provides the standard mechanism for an assistive technology to determine * and set the numerical value as well as get the minimum and maximum values. * Applications can determine * if an object supports the AccessibleValue interface by first * obtaining its AccessibleContext (see * {@link Accessible}) and then calling the * {@link AccessibleContext#getAccessibleValue} method. * If the return value is not null, the object supports this interface. * * @see Accessible * @see Accessible#getAccessibleContext * @see AccessibleContext * @see AccessibleContext#getAccessibleValue * * @author      Peter Korn * @author      Hans Muller * @author      Willie Walker */public interface AccessibleValue {     /**     * Get the value of this object as a Number.  If the value has not been     * set, the return value will be null.     *     * @return value of the object     * @see #setCurrentAccessibleValue     */    public Number getCurrentAccessibleValue();     /**     * Set the value of this object as a Number.     *     * @return True if the value was set; else False     * @see #getCurrentAccessibleValue     */    public boolean setCurrentAccessibleValue(Number n); //    /**//     * Get the description of the value of this object.//     *//     * @return description of the value of the object//     *///    public String getAccessibleValueDescription();     /**     * Get the minimum value of this object as a Number.     *     * @return Minimum value of the object; null if this object does not     * have a minimum value     * @see #getMaximumAccessibleValue     */    public Number getMinimumAccessibleValue();     /**     * Get the maximum value of this object as a Number.     *     * @return Maximum value of the object; null if this object does not     * have a maximum value     * @see #getMinimumAccessibleValue     */    public Number getMaximumAccessibleValue();}