jaroslav@49: /*
jaroslav@49:  * Copyright (c) 1994, 2001, Oracle and/or its affiliates. All rights reserved.
jaroslav@49:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
jaroslav@49:  *
jaroslav@49:  * This code is free software; you can redistribute it and/or modify it
jaroslav@49:  * under the terms of the GNU General Public License version 2 only, as
jaroslav@49:  * published by the Free Software Foundation.  Oracle designates this
jaroslav@49:  * particular file as subject to the "Classpath" exception as provided
jaroslav@49:  * by Oracle in the LICENSE file that accompanied this code.
jaroslav@49:  *
jaroslav@49:  * This code is distributed in the hope that it will be useful, but WITHOUT
jaroslav@49:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jaroslav@49:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
jaroslav@49:  * version 2 for more details (a copy is included in the LICENSE file that
jaroslav@49:  * accompanied this code).
jaroslav@49:  *
jaroslav@49:  * You should have received a copy of the GNU General Public License version
jaroslav@49:  * 2 along with this work; if not, write to the Free Software Foundation,
jaroslav@49:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
jaroslav@49:  *
jaroslav@49:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
jaroslav@49:  * or visit www.oracle.com if you need additional information or have any
jaroslav@49:  * questions.
jaroslav@49:  */
jaroslav@49: 
jaroslav@49: package java.lang;
jaroslav@49: 
jaroslav@49: /**
jaroslav@49:  * The abstract class <code>Number</code> is the superclass of classes
jaroslav@49:  * <code>BigDecimal</code>, <code>BigInteger</code>,
jaroslav@49:  * <code>Byte</code>, <code>Double</code>, <code>Float</code>,
jaroslav@49:  * <code>Integer</code>, <code>Long</code>, and <code>Short</code>.
jaroslav@49:  * <p>
jaroslav@49:  * Subclasses of <code>Number</code> must provide methods to convert
jaroslav@49:  * the represented numeric value to <code>byte</code>, <code>double</code>,
jaroslav@49:  * <code>float</code>, <code>int</code>, <code>long</code>, and
jaroslav@49:  * <code>short</code>.
jaroslav@49:  *
jaroslav@49:  * @author      Lee Boynton
jaroslav@49:  * @author      Arthur van Hoff
jaroslav@49:  * @see     java.lang.Byte
jaroslav@49:  * @see     java.lang.Double
jaroslav@49:  * @see     java.lang.Float
jaroslav@49:  * @see     java.lang.Integer
jaroslav@49:  * @see     java.lang.Long
jaroslav@49:  * @see     java.lang.Short
jaroslav@49:  * @since   JDK1.0
jaroslav@49:  */
jaroslav@49: public abstract class Number implements java.io.Serializable {
jaroslav@49:     /**
jaroslav@49:      * Returns the value of the specified number as an <code>int</code>.
jaroslav@49:      * This may involve rounding or truncation.
jaroslav@49:      *
jaroslav@49:      * @return  the numeric value represented by this object after conversion
jaroslav@49:      *          to type <code>int</code>.
jaroslav@49:      */
jaroslav@49:     public abstract int intValue();
jaroslav@49: 
jaroslav@49:     /**
jaroslav@49:      * Returns the value of the specified number as a <code>long</code>.
jaroslav@49:      * This may involve rounding or truncation.
jaroslav@49:      *
jaroslav@49:      * @return  the numeric value represented by this object after conversion
jaroslav@49:      *          to type <code>long</code>.
jaroslav@49:      */
jaroslav@49:     public abstract long longValue();
jaroslav@49: 
jaroslav@49:     /**
jaroslav@49:      * Returns the value of the specified number as a <code>float</code>.
jaroslav@49:      * This may involve rounding.
jaroslav@49:      *
jaroslav@49:      * @return  the numeric value represented by this object after conversion
jaroslav@49:      *          to type <code>float</code>.
jaroslav@49:      */
jaroslav@49:     public abstract float floatValue();
jaroslav@49: 
jaroslav@49:     /**
jaroslav@49:      * Returns the value of the specified number as a <code>double</code>.
jaroslav@49:      * This may involve rounding.
jaroslav@49:      *
jaroslav@49:      * @return  the numeric value represented by this object after conversion
jaroslav@49:      *          to type <code>double</code>.
jaroslav@49:      */
jaroslav@49:     public abstract double doubleValue();
jaroslav@49: 
jaroslav@49:     /**
jaroslav@49:      * Returns the value of the specified number as a <code>byte</code>.
jaroslav@49:      * This may involve rounding or truncation.
jaroslav@49:      *
jaroslav@49:      * @return  the numeric value represented by this object after conversion
jaroslav@49:      *          to type <code>byte</code>.
jaroslav@49:      * @since   JDK1.1
jaroslav@49:      */
jaroslav@49:     public byte byteValue() {
jaroslav@49:         return (byte)intValue();
jaroslav@49:     }
jaroslav@49: 
jaroslav@49:     /**
jaroslav@49:      * Returns the value of the specified number as a <code>short</code>.
jaroslav@49:      * This may involve rounding or truncation.
jaroslav@49:      *
jaroslav@49:      * @return  the numeric value represented by this object after conversion
jaroslav@49:      *          to type <code>short</code>.
jaroslav@49:      * @since   JDK1.1
jaroslav@49:      */
jaroslav@49:     public short shortValue() {
jaroslav@49:         return (short)intValue();
jaroslav@49:     }
jaroslav@49: 
jaroslav@49:     /** use serialVersionUID from JDK 1.0.2 for interoperability */
jaroslav@49:     private static final long serialVersionUID = -8742448824652078965L;
jaroslav@49: }