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Added in API level 1

Summary: Ctors | Methods | Inherited Methods | [Expand All]

public abstract class Number
extends Object implements Serializable

java.lang.Object
↳	java.lang.Number

Known Direct Subclasses

AtomicInteger, AtomicLong, BigDecimal, BigInteger, Byte, Double, DoubleAccumulator, DoubleAdder, Float, Integer, Long, LongAccumulator, LongAdder, Rational, Short

AtomicInteger	An `int` value that may be updated atomically.
AtomicLong	A `long` value that may be updated atomically.
BigDecimal	The `BigDecimal` class implements immutable arbitrary-precision decimal numbers.
BigInteger	An immutable arbitrary-precision signed integer.
Byte	The `Byte` class wraps a value of primitive type `byte` in an object.
Double	The `Double` class wraps a value of the primitive type `double` in an object.
DoubleAccumulator	One or more variables that together maintain a running `double` value updated using a supplied function.
DoubleAdder	One or more variables that together maintain an initially zero `double` sum.
Float	The `Float` class wraps a value of primitive type `float` in an object.
Integer	The `Integer` class wraps a value of the primitive type `int` in an object.
Long	The `Long` class wraps a value of the primitive type `long` in an object.
LongAccumulator	One or more variables that together maintain a running `long` value updated using a supplied function.
LongAdder	One or more variables that together maintain an initially zero `long` sum.
Rational	An immutable data type representation a rational number.
Short	The `Short` class wraps a value of primitive type `short` in an object.

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.

See also:

Public constructors
`Number()`

Public methods
`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`.

From class java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long millis, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long millis)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

Added in API level 1

Number ()

Added in API level 1

byte byteValue ()

Returns the value of the specified number as a byte. This may involve rounding or truncation.

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

Added in API level 1

double doubleValue ()

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

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

Added in API level 1

float floatValue ()

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

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

Added in API level 1

int intValue ()

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

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

Added in API level 1

long longValue ()

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

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

Added in API level 1

short shortValue ()

Returns the value of the specified number as a short. This may involve rounding or truncation.

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