public abstract class Number extends Object implements Serializable
Number is the superclass of platform
classes representing numeric values that are convertible to the
primitive types byte, double, float, int, long, and short.
The specific semantics of the conversion from the numeric value of
a particular Number implementation to a given primitive
type is defined by the Number implementation in question.
For platform classes, the conversion is often analogous to a
narrowing primitive conversion or a widening primitive conversion
as defining in The Java™ Language Specification
for converting between primitive types. Therefore, conversions may
lose information about the overall magnitude of a numeric value, may
lose precision, and may even return a result of a different sign
than the input.
See the documentation of a given Number implementation for
conversion details.| Constructor and Description |
|---|
Number () |
| Modifier and Type | Method and Description |
|---|---|
byte |
byteValue ()
Returns the value of the specified number as a
byte,
which may involve rounding or truncation. |
abstract double |
doubleValue ()
Returns the value of the specified number as a
double,
which may involve rounding. |
abstract float |
floatValue ()
Returns the value of the specified number as a
float,
which may involve rounding. |
abstract int |
intValue ()
Returns the value of the specified number as an
int,
which may involve rounding or truncation. |
abstract long |
longValue ()
Returns the value of the specified number as a
long,
which may involve rounding or truncation. |
short |
shortValue ()
Returns the value of the specified number as a
short,
which may involve rounding or truncation. |
public Number()
public abstract int intValue()
int,
which may involve rounding or truncation.int.public abstract long longValue()
long,
which may involve rounding or truncation.long.public abstract float floatValue()
float,
which may involve rounding.float.public abstract double doubleValue()
double,
which may involve rounding.double.public byte byteValue()
byte,
which may involve rounding or truncation.
This implementation returns the result of intValue() cast
to a byte.
byte.public short shortValue()
short,
which may involve rounding or truncation.
This implementation returns the result of intValue() cast
to a short.
short. Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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