Serializable
AtomicInteger
, AtomicLong
, BigDecimal
, BigInteger
, Byte
, Double
, DoubleAccumulator
, DoubleAdder
, Float
, Integer
, Long
, LongAccumulator
, LongAdder
, Short
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 defined 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 | Description |
---|---|
Number() |
Constructor for subclasses to call. |
Modifier and Type | Method | Description |
---|---|---|
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 . |
public Number()
public abstract int intValue()
int
.int
.public abstract long longValue()
long
.long
.public abstract float floatValue()
float
.float
.public abstract double doubleValue()
double
.double
.public byte byteValue()
byte
.intValue()
cast to a byte
.byte
.public short shortValue()
short
.intValue()
cast to a short
.short
.
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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
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https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/lang/Number.html