: Class Number

Overview

Package

Class

Use

Tree

Deprecated

Index

Help

PREV CLASS NEXT CLASS

FRAMES NO FRAMES

SUMMARY: INNER | FIELD | CONSTR | METHOD

DETAIL: FIELD | CONSTR | METHOD

java.lang
Class Number

java.lang.Object
  |
  +--java.lang.Number

Direct Known Subclasses:: Byte, Double, Float, Integer, Long, Short

public abstract class Number
extends Object
implements Serializable

The abstract class Number is the superclass of classes 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.

Since:: JDK1.0
See Also:: Byte, Double, Float, Integer, Long, Short, Serialized Form

Field Summary
`private static long`	`serialVersionUID` use serialVersionUID from JDK 1.0.2 for interoperability

Constructor Summary
`Number()`

Method Summary
`byte`	`byteValue()` Returns the value of the specified number as a `byte`.
`abstract double`	`doubleValue()` Returns the value of the specified number as a `double`.
`abstract float`	`floatValue()` Returns the value of the specified number as a `float`.
`abstract int`	`intValue()` Returns the value of the specified number as an `int`.
`abstract long`	`longValue()` Returns the value of the specified number as a `long`.
`short`	`shortValue()` Returns the value of the specified number as a `short`.

Methods inherited from class java.lang.Object

, 
clone, 
equals, 
finalize, 
getClass, 
hashCode, 
notify, 
notifyAll, 
registerNatives, 
toString, 
wait, 
wait, 
wait

Field Detail

serialVersionUID

private static final long serialVersionUID

use serialVersionUID from JDK 1.0.2 for interoperability

Constructor Detail

Number

public Number()

Method Detail

intValue

public abstract int intValue()

Returns the value of the specified number as an int. This may involve rounding.

Returns:: the numeric value represented by this object after conversion to type int.

longValue

public abstract long longValue()

Returns the value of the specified number as a long. This may involve rounding.

Returns:: the numeric value represented by this object after conversion to type long.

floatValue

public abstract float floatValue()

Returns the value of the specified number as a float. This may involve rounding.

Returns:: the numeric value represented by this object after conversion to type float.

doubleValue

public abstract double doubleValue()

Returns the value of the specified number as a double. This may involve rounding.

Returns:: the numeric value represented by this object after conversion to type double.

byteValue

public byte byteValue()

Returns the value of the specified number as a byte. This may involve rounding or truncation.

Returns:: the numeric value represented by this object after conversion to type byte.
Since:: JDK1.1

shortValue

public short shortValue()

Returns the value of the specified number as a short. This may involve rounding or truncation.

Returns:: the numeric value represented by this object after conversion to type short.
Since:: JDK1.1