- java.lang.Object
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- java.lang.Number
 
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- 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 classNumberis 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 particularNumberimplementation to a given primitive type is defined by theNumberimplementation 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 givenNumberimplementation for conversion details.- Since:
- 1.0
- See Also:
- Serialized Form
- See The Java™ Language Specification:
- 5.1.2 Widening Primitive Conversions, 5.1.3 Narrowing Primitive Conversions
 
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Constructor SummaryConstructors Constructor Description Number()
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Method SummaryAll Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description bytebyteValue()Returns the value of the specified number as abyte.abstract doubledoubleValue()Returns the value of the specified number as adouble.abstract floatfloatValue()Returns the value of the specified number as afloat.abstract intintValue()Returns the value of the specified number as anint.abstract longlongValue()Returns the value of the specified number as along.shortshortValue()Returns the value of the specified number as ashort.
 
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Method Detail- 
intValuepublic abstract int intValue() Returns the value of the specified number as anint.- Returns:
- the numeric value represented by this object after conversion
          to type int.
 
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longValuepublic abstract long longValue() Returns the value of the specified number as along.- Returns:
- the numeric value represented by this object after conversion
          to type long.
 
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floatValuepublic abstract float floatValue() Returns the value of the specified number as afloat.- Returns:
- the numeric value represented by this object after conversion
          to type float.
 
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doubleValuepublic abstract double doubleValue() Returns the value of the specified number as adouble.- Returns:
- the numeric value represented by this object after conversion
          to type double.
 
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byteValuepublic byte byteValue() Returns the value of the specified number as abyte.This implementation returns the result of intValue()cast to abyte.- Returns:
- the numeric value represented by this object after conversion
          to type byte.
- Since:
- 1.1
 
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shortValuepublic short shortValue() Returns the value of the specified number as ashort.This implementation returns the result of intValue()cast to ashort.- Returns:
- the numeric value represented by this object after conversion
          to type short.
- Since:
- 1.1
 
 
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