Java™ Platform
Standard Ed. 6

java.lang
Class Number

java.lang.Object
  extended by java.lang.Number
All Implemented Interfaces:
Serializable
Direct Known Subclasses:
AtomicInteger, 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

Java™ Platform
Standard Ed. 6

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For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

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