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Number.java API Doc Java SE 5 API 3072 Fri Aug 26 14:57:04 BST 2005 java.lang

Number

java.lang.Object

public abstract class Number extends Object implements Serializable

The abstract class Number is the superclass of classes BigDecimal, BigInteger, Byte, Double, Float, Integer, Long, and Short.

Subclasses of Number must provide methods to convert the represented numeric value to byte, double, float, int, long, and short.

author: Lee Boynton
author: Arthur van Hoff
version: 1.29, 12/19/03
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

Fields Summary
private static final long
serialVersionUID
use serialVersionUID from JDK 1.0.2 for interoperability
Constructors Summary
Methods Summary
public byte byteValue()
Returns the value of the specified number as a byte. This may involve rounding or truncation.
return
the numeric value represented by this object after conversion to type byte.
since
JDK1.1
return (byte)intValue();
public abstract double doubleValue()
Returns the value of the specified number as a double. This may involve rounding.
return
the numeric value represented by this object after conversion to type double.
public abstract float floatValue()
Returns the value of the specified number as a float. This may involve rounding.
return
the numeric value represented by this object after conversion to type float.
public abstract int intValue()
Returns the value of the specified number as an int. This may involve rounding or truncation.
return
the numeric value represented by this object after conversion to type int.
public abstract long longValue()
Returns the value of the specified number as a long. This may involve rounding or truncation.
return
the numeric value represented by this object after conversion to type long.
public short shortValue()
Returns the value of the specified number as a short. This may involve rounding or truncation.
return
the numeric value represented by this object after conversion to type short.
since
JDK1.1
return (short)intValue();