/* * @(#)Number.java	1.34 06/10/10 * * Copyright  1990-2008 Sun Microsystems, Inc. All Rights Reserved.   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER   *    * This program 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.    *    * This program 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 at /legal/license.txt).    *    * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa   * Clara, CA 95054 or visit www.sun.com if you need additional   * information or have any questions.  * */package java.lang;/** * The abstract class <code>Number</code> is the superclass of classes * <code>BigDecimal</code>, <code>BigInteger</code>, * <code>Byte</code>, <code>Double</code>, <code>Float</code>, * <code>Integer</code>, <code>Long</code>, and <code>Short</code>. * NOTE: <B>java.math.BigDecimal</B> is found in J2ME CDC profiles such as  * J2ME Foundation Profile. * <p> * Subclasses of <code>Number</code> must provide methods to convert  * the represented numeric value to <code>byte</code>, <code>double</code>, * <code>float</code>, <code>int</code>, <code>long</code>, and * <code>short</code>. * * @author	Lee Boynton * @author	Arthur van Hoff * @version 1.25, 02/02/00 * @see     java.lang.Byte * @see     java.lang.Double * @see     java.lang.Float * @see     java.lang.Integer * @see     java.lang.Long * @see     java.lang.Short * @since   JDK1.0 */public abstract class Number implements java.io.Serializable {    /**     * Returns the value of the specified number as an <code>int</code>.     * This may involve rounding or truncation.     *     * @return  the numeric value represented by this object after conversion     *          to type <code>int</code>.     */    public abstract int intValue();    /**     * Returns the value of the specified number as a <code>long</code>.     * This may involve rounding or truncation.     *     * @return  the numeric value represented by this object after conversion     *          to type <code>long</code>.     */    public abstract long longValue();    /**     * Returns the value of the specified number as a <code>float</code>.     * This may involve rounding.     *     * @return  the numeric value represented by this object after conversion     *          to type <code>float</code>.     */    public abstract float floatValue();    /**     * Returns the value of the specified number as a <code>double</code>.     * This may involve rounding.     *     * @return  the numeric value represented by this object after conversion     *          to type <code>double</code>.     */    public abstract double doubleValue();    /**     * Returns the value of the specified number as a <code>byte</code>.     * This may involve rounding or truncation.     *     * @return  the numeric value represented by this object after conversion     *          to type <code>byte</code>.     * @since   JDK1.1     */    public byte byteValue() {	return (byte)intValue();    }    /**     * Returns the value of the specified number as a <code>short</code>.     * This may involve rounding or truncation.     *     * @return  the numeric value represented by this object after conversion     *          to type <code>short</code>.     * @since   JDK1.1     */    public short shortValue() {	return (short)intValue();    }    /** use serialVersionUID from JDK 1.0.2 for interoperability */    private static final long serialVersionUID = -8742448824652078965L;}