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Showing content from http://java.sun.com/j2se/1.5/docs/api/java/util/../../java/util/../../java/lang/Number.html below:

Number (Java 2 Platform SE 5.0)

java.lang
Class Number

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
extends Object
implements Serializable

The abstract class Number is the superclass of classes BigDecimal, 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, and short.

Since:: JDK1.0
See Also:: Byte, Double, Float, Integer, Long, Short, Serialized Form

Method Summary 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 clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait Number

public Number()

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

Submit a bug or feature For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

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