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java.lang
Class Number


java.lang.Object
  extended by java.lang.Number
All Implemented Interfaces:
Serializable
Direct Known Subclasses:
AtomicInteger BigDecimal , AtomicLong , BigDecimal , BigInteger , Byte , Double , Float , Integer , Long , Short 
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.

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

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 , toString , wait , wait , wait
 

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 or truncation.

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 or truncation.

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