| /* |
| * Copyright (c) 1994, 2001, Oracle and/or its affiliates. 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.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; |
| } |