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Number

public abstract class Number
extends Object implements Serializable

java.lang.Object
   ↳ java.lang.Number
Known Direct Subclasses


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.

Summary

Public constructors

Number()

Public methods

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.

Inherited methods

From class java.lang.Object

Public constructors

Number

added in API level 1
Number ()

Public methods

byteValue

added in API level 1
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
byte the numeric value represented by this object after conversion to type byte.

doubleValue

added in API level 1
double doubleValue ()

Returns the value of the specified number as a double, which may involve rounding.

Returns
double the numeric value represented by this object after conversion to type double.

floatValue

added in API level 1
float floatValue ()

Returns the value of the specified number as a float, which may involve rounding.

Returns
float the numeric value represented by this object after conversion to type float.

intValue

added in API level 1
int intValue ()

Returns the value of the specified number as an int, which may involve rounding or truncation.

Returns
int the numeric value represented by this object after conversion to type int.

longValue

added in API level 1
long longValue ()

Returns the value of the specified number as a long, which may involve rounding or truncation.

Returns
long the numeric value represented by this object after conversion to type long.

shortValue

added in API level 1
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
short the numeric value represented by this object after conversion to type short.

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