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