Class Number

java.lang.Object
java.lang.Number
All Implemented Interfaces:
Serializable
Direct Known Subclasses:
AtomicInteger,AtomicLong,BigDecimal,BigInteger,Byte,Double,DoubleAccumulator,DoubleAdder,Float,Float16,Integer,Long,LongAccumulator,LongAdder,Short
public abstract classNumberextendsObjectimplementsSerializable
The abstract classNumber is the superclass of platform classes representing numeric values that are convertible to the primitive typesbyte,double,float, int,long, andshort. The specific semantics of the conversion from the numeric value of a particularNumber implementation to a given primitive type is defined by theNumber implementation in question. For platform classes, the conversion is often analogous to a narrowing primitive conversion or a widening primitive conversion as defined inThe 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 givenNumber implementation for conversion details.
SeeJava Language Specification:
5.1.2 Widening Primitive Conversion
5.1.3 Narrowing Primitive Conversion
Since:
1.0
See Also:

  • Constructor Summary

    Constructors
    Constructor
    Description
    Constructor for subclasses to call.

  • Method Summary

    Modifier and Type
    Method
    Description
    byte
    Returns the value of the specified number as abyte.
    abstract double
    Returns the value of the specified number as adouble.
    abstract float
    Returns the value of the specified number as afloat.
    abstract int
    Returns the value of the specified number as anint.
    abstract long
    Returns the value of the specified number as along.
    short
    Returns the value of the specified number as ashort.

  • Constructor Details

    • Number

      public Number()
      Constructor for subclasses to call.

  • Method Details

    • intValue

      public abstract int intValue()
      Returns the value of the specified number as anint.
      Returns:
      the numeric value represented by this object after conversion to typeint.

    • longValue

      public abstract long longValue()
      Returns the value of the specified number as along.
      Returns:
      the numeric value represented by this object after conversion to typelong.

    • floatValue

      public abstract float floatValue()
      Returns the value of the specified number as afloat.
      Returns:
      the numeric value represented by this object after conversion to typefloat.

    • doubleValue

      public abstract double doubleValue()
      Returns the value of the specified number as adouble.
      Returns:
      the numeric value represented by this object after conversion to typedouble.

    • byteValue

      public byte byteValue()
      Returns the value of the specified number as abyte.
      Implementation Requirements:
      The default implementation returns the result ofintValue() cast to abyte.
      Returns:
      the numeric value represented by this object after conversion to typebyte.
      Since:
      1.1

    • shortValue

      public short shortValue()
      Returns the value of the specified number as ashort.
      Implementation Requirements:
      The default implementation returns the result ofintValue() cast to ashort.
      Returns:
      the numeric value represented by this object after conversion to typeshort.
      Since:
      1.1