/*

 * Copyright 1994-2001 Sun Microsystems, Inc.  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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA 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>.

 * <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

 * @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;

}