Number (Java Platform SE 7 ) (original) (raw)

• java.lang.Object

• • java.lang.Number

• All Implemented Interfaces:
  Serializable
  Direct Known Subclasses:
  AtomicInteger, AtomicLong, BigDecimal, BigInteger, Byte, Double, Float, Integer, Long, Short

public abstract class Number
extends Object
implements Serializable
The abstract class Number is the superclass of classesBigDecimal, BigInteger,Byte, Double, Float,Integer, Long, and Short.
Subclasses of Number must provide methods to convert the represented numeric value to byte, double,float, int, long, andshort.
Since:
JDK1.0
See Also:
Byte, Double, Float, Integer, Long, Short, Serialized Form

• • Constructor Summary

  Constructors

  Constructor and Description
  Number()

  • Method Summary

  Methods

  Modifier and Type	Method and 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.

     * ### Methods inherited from class java.lang.[Object](../../java/lang/Object.html "class in java.lang")  
     `[clone](../../java/lang/Object.html#clone%28%29), [equals](../../java/lang/Object.html#equals%28java.lang.Object%29), [finalize](../../java/lang/Object.html#finalize%28%29), [getClass](../../java/lang/Object.html#getClass%28%29), [hashCode](../../java/lang/Object.html#hashCode%28%29), [notify](../../java/lang/Object.html#notify%28%29), [notifyAll](../../java/lang/Object.html#notifyAll%28%29), [toString](../../java/lang/Object.html#toString%28%29), [wait](../../java/lang/Object.html#wait%28%29), [wait](../../java/lang/Object.html#wait%28long%29), [wait](../../java/lang/Object.html#wait%28long,%20int%29)`

• • Constructor Detail

     * #### Number  
     public Number()  

  • Method Detail

    * #### intValue  
    public abstract int intValue()  
    Returns the value of the specified number as an `int`. This 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`. This 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`. This 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`. This 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`. This may involve rounding or truncation.  
    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`. This may involve rounding or truncation.  
    Returns:  
    the numeric value represented by this object after conversion to type `short`.  
    Since:  
    JDK1.1

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