java.lang
Class Number

java.lang.Object
  extended by java.lang.Number
All Implemented Interfaces:
Serializable
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.

See Also:
Byte, Double, Float, Integer, Long, Short, Serialized Form

Constructor Summary
Number()
           
 
Method Summary
abstract  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.
abstract  short shortValue()
          Returns the value of the specified number as a short.
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

Number

public Number()
Method Detail

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.

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.

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.

shortValue

public abstract 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

byteValue

public abstract 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.


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