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/*
* @(#)Number.java 1.28 03/01/23
*
* Copyright 2003 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
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
* @version 1.28, 01/23/03
* @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;
}
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