1 /* Number.java =- abstract superclass of numeric objects
2 Copyright (C) 1998, 2001, 2002, 2005 Free Software Foundation, Inc.
4 This file is part of GNU Classpath.
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7 it under the terms of the GNU General Public License as published by
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14 General Public License for more details.
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18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library. Thus, the terms and
23 conditions of the GNU General Public License cover the whole
26 As a special exception, the copyright holders of this library give you
27 permission to link this library with independent modules to produce an
28 executable, regardless of the license terms of these independent
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30 terms of your choice, provided that you also meet, for each linked
31 independent module, the terms and conditions of the license of that
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41 //import java.io.Serializable;
44 * Number is a generic superclass of all the numeric classes, including
45 * the wrapper classes {@link Byte}, {@link Short}, {@link Integer},
46 * {@link Long}, {@link Float}, and {@link Double}. Also worth mentioning
47 * are the classes in {@link java.math}.
49 * It provides ways to convert numeric objects to any primitive.
54 * @author Eric Blake (ebb9@email.byu.edu)
56 * @status updated to 1.4
58 public /*abstract*/ class Number //implements Serializable
61 * Compatible with JDK 1.1+.
63 //private static final long serialVersionUID = -8742448824652078965L;
66 * Table for calculating digits, used in Character, Long, and Integer.
68 /*static*/ final char[] digits;
71 * The basic constructor (often called implicitly).
74 digits = new char[36];
114 * Return the value of this <code>Number</code> as an <code>int</code>.
116 * @return the int value
118 public /*abstract*/ int intValue() {
122 * Return the value of this <code>Number</code> as a <code>long</code>.
124 * @return the long value
126 public /*abstract*/ long longValue() {
130 * Return the value of this <code>Number</code> as a <code>float</code>.
132 * @return the float value
134 public /*abstract*/ float floatValue() {
138 * Return the value of this <code>Number</code> as a <code>float</code>.
140 * @return the double value
142 public /*abstract*/ double doubleValue() {
146 * Return the value of this <code>Number</code> as a <code>byte</code>.
148 * @return the byte value
151 public byte byteValue() {
152 return (byte) intValue();
156 * Return the value of this <code>Number</code> as a <code>short</code>.
158 * @return the short value
161 public short shortValue() {
162 return (short) intValue();