Android - An Open Handset Alliance Project

java.lang
public final class

java.lang.Double

java.lang.Object
	java.lang.Number		Serializable
		java.lang.Double	Comparable

Double is the wrapper for the primitive type double.

Summary

Constants

			Value
double	MAX_VALUE	Constant for the maximum `double` value, (2 - 2^{-52/sup>) * 2¹⁰²³.}	1.7976931348623157E308
double	MIN_VALUE	Constant for the minimum `double` value, 2^-1074.	4.9E-324
double	NEGATIVE_INFINITY	Constant for the Negative Infinity value of the `double` type.	-Infinity
double	NaN	Constant for the Not-a-Number (NaN) value of the `double` type.	NaN
double	POSITIVE_INFINITY	Constant for the Positive Infinity value of the `double` type.	Infinity
int	SIZE	Constant for the number of bits to represent a `double` in two's compliment form.	64	0x00000040
Class	TYPE	The java.lang.Class that represents this class.

Public Constructors

					Double(double value)
					Constructs a new instance of the receiver which represents the double valued argument.
					Double(String string)
					Constructs a new instance of this class given a string.

Public Methods

	byte	byteValue()
		Answers the byte value which the receiver represents
static	int	compare(double double1, double double2)
		Compares the two doubles.
	int	compareTo(Double object)
		Compares the receiver with the Double parameter.
static	long	doubleToLongBits(double value)
		Answers the binary representation of the argument, as a long.
static	long	doubleToRawLongBits(double value)
		Answers the binary representation of the argument, as a long.
	double	doubleValue()
		Answers the receiver's value as a double.
	boolean	equals(Object object)
		Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
	float	floatValue()
		Answers the float value which the receiver represents
	int	hashCode()
		Answers an integer hash code for the receiver.
	int	intValue()
		Answers the receiver's value as an integer.
static	boolean	isInfinite(double d)
		Answers true if the argument represents an infinite quantity, and false otherwise.
	boolean	isInfinite()
		Answers true if the receiver represents an infinite quantity, and false otherwise.
static	boolean	isNaN(double d)
		Answers true if the argument does not represent a valid double quantity.
	boolean	isNaN()
		Answers true if the receiver does not represent a valid float quantity.
static	double	longBitsToDouble(long bits)
		Answers a double built from the binary representation given in the argument.
	long	longValue()
		Answers the long value which the receiver represents
static	double	parseDouble(String string)
		Answers the double which matches the passed in string.
	short	shortValue()
		Answers the short value which the receiver represents
static	String	toHexString(double d)
		Converts a `double` into a hexadecimal string representation.
	String	toString()
		Answers a string containing a concise, human-readable description of the receiver.
static	String	toString(double d)
		Answers a string containing a printable representation of the argument.
static	Double	valueOf(String string)
		Answers the double which matches the passed in string.
static	Double	valueOf(double d)
		Returns a `Double` instance for the `double` value passed.

Methods inherited from class java.lang.Number

byteValue, doubleValue, floatValue, intValue, longValue, shortValue

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

	Object	clone()
		Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
	boolean	equals(Object o)
		Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
	void	finalize()
		Called by the virtual machine when there are no longer any (non-weak) references to the receiver.
final	Class	getClass()
		Answers the unique instance of java.lang.Class which represents the class of the receiver.
	int	hashCode()
		Answers an integer hash code for the receiver.
final	void	notify()
		Causes one thread which is `wait` ing on the receiver to be made ready to run.
final	void	notifyAll()
		Causes all threads which are `wait` ing on the receiver to be made ready to run.
	String	toString()
		Answers a string containing a concise, human-readable description of the receiver.
final	void	wait(long time, int frac)
		Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by `notify` or `notifyAll`) or the expiration of the timeout.
final	void	wait(long time)
		Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by `notify` or `notifyAll`) or the expiration of the timeout.
final	void	wait()
		Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by `notify` or `notifyAll`).

Methods inherited from interface java.lang.Comparable

compareTo

Details

Constants

public static final double MAX_VALUE

Constant for the maximum double value, (2 - 2^{-52/sup>) *
2¹⁰²³.}

Constant Value: 1.7976931348623157E308

public static final double MIN_VALUE

Constant for the minimum double value, 2^-1074.

Constant Value: 4.9E-324

public static final double NEGATIVE_INFINITY

Constant for the Negative Infinity value of the double type.

Constant Value: -Infinity

public static final double NaN

Constant for the Not-a-Number (NaN) value of the double type.

Constant Value: NaN

public static final double POSITIVE_INFINITY

Constant for the Positive Infinity value of the double type.

Constant Value: Infinity

public static final int SIZE

Constant for the number of bits to represent a double in two's compliment form.

Constant Value: 64 (0x00000040)

public static final Class TYPE

The java.lang.Class that represents this class.

Public Constructors

public Double(double value)

Constructs a new instance of the receiver which represents the double valued argument.

Parameters

value	the double to store in the new instance.

public Double(String string)

Constructs a new instance of this class given a string.

Parameters

string	a string representation of a double quantity.

Throws

NumberFormatException	if the argument could not be parsed as a double quantity.

Public Methods

public byte byteValue()

Answers the byte value which the receiver represents

Returns

byte the value of the receiver.

public static int compare(double double1, double double2)

Compares the two doubles. NaN is equal to NaN, and is greater than other double values. 0d is greater than -0d.

Parameters

double1	the first value to compare
double2	the second value to compare

Returns

Returns greater than zero when double1 is greater than double2, zero when double1 equals double2, and less than zero when double1 is less than double2

public int compareTo(Double object)

Compares the receiver with the Double parameter. NaN is equal to NaN, and is greater than other double values. 0d is greater than -0d.

Parameters

object	the Double to compare to the receiver

Returns

Returns greater than zero when this.doubleValue() is greater than object.doubleValue(), zero when this.doubleValue() equals object.doubleValue(), and less than zero when this.doubleValue() is less than object.doubleValue()

Throws

NullPointerException	if `object` is `null`.

public static long doubleToLongBits(double value)

Answers the binary representation of the argument, as a long.

Parameters

value	The double value to convert

Returns

the bits of the double.

public static long doubleToRawLongBits(double value)

Answers the binary representation of the argument, as a long.

Parameters

value	The double value to convert

Returns

the bits of the double.

public double doubleValue()

Answers the receiver's value as a double.

Returns

the receiver's value

public boolean equals(Object object)

Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison. For Doubles, the check verifies that the receiver's value's bit pattern matches the bit pattern of the argument, which must also be a Double.

Parameters

object	the object to compare with this object

Returns

true if the object is the same as this object false if it is different from this object

public float floatValue()

Answers the float value which the receiver represents

Returns

float the value of the receiver.

public int hashCode()

Answers an integer hash code for the receiver. Any two objects which answer true when passed to equals must answer the same value for this method.

Returns

the receiver's hash

public int intValue()

Answers the receiver's value as an integer.

Returns

the receiver's value as an integer

public static boolean isInfinite(double d)

Answers true if the argument represents an infinite quantity, and false otherwise.

Parameters

d	value to check for infinitness.

Returns

true if the argument is positive or negative infinity false if it is not an infinite value

public boolean isInfinite()

Answers true if the receiver represents an infinite quantity, and false otherwise.

Returns

true if the argument is positive or negative infinity false if it is not an infinite value

public static boolean isNaN(double d)

Answers true if the argument does not represent a valid double quantity.

Parameters

d	value to check for numberness.

Returns

true if the argument is Not A Number false if it is a (potentially infinite) double number

public boolean isNaN()

Answers true if the receiver does not represent a valid float quantity.

Returns

true if the argument is Not A Number false if it is a (potentially infinite) float number

public static double longBitsToDouble(long bits)

Answers a double built from the binary representation given in the argument.

Parameters

bits	the bits of the double

Returns

the double which matches the bits

public long longValue()

Answers the long value which the receiver represents

Returns

long the value of the receiver.

public static double parseDouble(String string)

Answers the double which matches the passed in string. NumberFormatException is thrown if the string does not represent a valid double.

Parameters

string	the value to convert

Returns

a double which would print as the argument

Throws

NumberFormatException

public short shortValue()

Answers the short value which the receiver represents

Returns

short the value of the receiver.

public static String toHexString(double d)

Converts a double into a hexadecimal string representation.

Parameters

d	The `double` to convert.

Returns

The hexadecimal string representation of f.

public String toString()

Answers a string containing a concise, human-readable description of the receiver.

Returns

a printable representation for the receiver.

public static String toString(double d)

Answers a string containing a printable representation of the argument.

Parameters

d	the double to print

Returns

a printable representation of the argument.

public static Double valueOf(String string)

Answers the double which matches the passed in string. NumberFormatException is thrown if the string does not represent a valid double.

Parameters

string	the value to convert

Returns

a double which would print as the argument

Throws

NumberFormatException

public static Double valueOf(double d)

Returns a Double instance for the double value passed. This method is preferred over the constructor, as this method may maintain a cache of instances.

Parameters

d	The double value.

Returns

A Double instance.

				int	compareTo(T another)
					Answers an integer indicating the relative positions of the receiver and the argument in the natural order of elements of the receiver's class.


e.g. "intent" or "activity"

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Documentation

Goodies

java.lang.Double

See Also

Summary

Constants

Public Constructors

Public Methods

Methods inherited from class java.lang.Number

Methods inherited from class java.lang.Object

Methods inherited from interface java.lang.Comparable

Details

Constants

public static final double MAX_VALUE

public static final double MIN_VALUE

public static final double NEGATIVE_INFINITY

public static final double NaN

public static final double POSITIVE_INFINITY

public static final int SIZE

public static final Class TYPE

Public Constructors

public Double(double value)

Parameters

public Double(String string)

Parameters

Throws

Public Methods

public byte byteValue()

Returns

public static int compare(double double1, double double2)

Parameters

Returns

public int compareTo(Double object)

Parameters

Returns

Throws

public static long doubleToLongBits(double value)

Parameters

Returns

public static long doubleToRawLongBits(double value)

Parameters

Returns

public double doubleValue()

Returns

public boolean equals(Object object)

Parameters

Returns

See Also

public float floatValue()

Returns

public int hashCode()

Returns

See Also

public int intValue()

Returns

public static boolean isInfinite(double d)

Parameters

Returns

public boolean isInfinite()

Returns

public static boolean isNaN(double d)

Parameters

Returns

public boolean isNaN()

Returns

public static double longBitsToDouble(long bits)

Parameters

Returns

public long longValue()

Returns

public static double parseDouble(String string)

Parameters

Returns

Throws

public short shortValue()

Returns

public static String toHexString(double d)

Parameters

Returns