Class Number
- java.lang.Object
-
- java.lang.Number
- All Implemented Interfaces:
- Serializable
- Direct Known Subclasses:
- AtomicInteger, AtomicLong, BigDecimal, BigInteger, Byte, Double, DoubleAccumulator, DoubleAdder, Float, Integer, Long, LongAccumulator, LongAdder, Short
public abstract class Number extends Object implements Serializable
The abstract class 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.
- Since:
- JDK1.0
- See Also:
- Serialized Form
Constructors
| Constructor and Description |
|---|
Number() |
Methods
| Modifier and Type | Method and Description |
|---|---|
byte |
byteValue() Returns the value of the specified number as a |
abstract double |
doubleValue() Returns the value of the specified number as a |
abstract float |
floatValue() Returns the value of the specified number as a |
abstract int |
intValue() Returns the value of the specified number as an |
abstract long |
longValue() Returns the value of the specified number as a |
short |
shortValue() Returns the value of the specified number as a |
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait Constructors
Number
public Number()
Methods
intValue
public abstract int intValue()
Returns the value of the specified number as an int, which 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, which 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, which 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, which 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, which may involve rounding or truncation.
This implementation returns the result of intValue() cast to a byte.
- 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, which may involve rounding or truncation.
This implementation returns the result of intValue() cast to a short.
- Returns:
- the numeric value represented by this object after conversion to type
short. - Since:
- JDK1.1
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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.
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https://docs.oracle.com/javase/8/docs/api/java/lang/Number.html