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Java Source Code / Java Documentation » Apache Harmony Java SE » java package » java.lang

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

java.lang .Number

java.lang .Double

Double
final public class Double extends Number implements Comparable<Double>(Code)
	Double is the wrapper for the primitive type `double`. See Also: java.lang.Number since: 1.0

Field Summary
final public static double	MAX_VALUE Constant for the maximum `double` value, (2 - 2^{-52/sup>) * 2¹⁰²³.}
final public static double	MIN_VALUE Constant for the minimum `double` value, 2^-1074.
final public static double	NEGATIVE_INFINITY Constant for the Negative Infinity value of the `double` type.
final public static double	NaN Constant for the Not-a-Number (NaN) value of the `double` type.
final public static double	POSITIVE_INFINITY Constant for the Positive Infinity value of the `double` type.
final public static int	SIZE Constant for the number of bits to represent a `double` in two's compliment form.
final public static Class<Double>	TYPE The java.lang.Class that represents this class.

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

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

Field Detail

MAX_VALUE
final public static double MAX_VALUE(Code)
	Constant for the maximum `double` value, (2 - 2^{-52/sup>) * 2¹⁰²³.}

MIN_VALUE
final public static double MIN_VALUE(Code)
	Constant for the minimum `double` value, 2^-1074.

NEGATIVE_INFINITY
final public static double NEGATIVE_INFINITY(Code)
	Constant for the Negative Infinity value of the `double` type.

NaN
final public static double NaN(Code)
	Constant for the Not-a-Number (NaN) value of the `double` type.

POSITIVE_INFINITY
final public static double POSITIVE_INFINITY(Code)
	Constant for the Positive Infinity value of the `double` type.

SIZE
final public static int SIZE(Code)
	Constant for the number of bits to represent a `double` in two's compliment form. since: 1.5

TYPE
final public static Class<Double> TYPE(Code)
	The java.lang.Class that represents this class. since: 1.1

Constructor Detail

Double
public Double(double value)(Code)
	Constructs a new instance of the receiver which represents the double valued argument. Parameters: value - the double to store in the new instance.

Double
public Double(String string) throws NumberFormatException(Code)
	Constructs a new instance of this class given a string. Parameters: string - a string representation of a double quantity. exception: NumberFormatException - if the argument could not be parsed as a double quantity.

Method Detail

byteValue
public byte byteValue()(Code)
	Answers the byte value which the receiver represents byte the value of the receiver.

compare
public static int compare(double double1, double double2)(Code)
	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 Parameters: double2 - the second value to compare Returns greater than zero when double1 is greater than double2,zero when double1 equals double2, and less than zero when double1is less than double2

compareTo
public int compareTo(Double object)(Code)
	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 greater than zero when this.doubleValue() is greater thanobject.doubleValue(), zero when this.doubleValue() equalsobject.doubleValue(), and less than zero when this.doubleValue()is less than object.doubleValue() throws: NullPointerException - if `object` is `null`. since: 1.2

doubleToLongBits
native public static long doubleToLongBits(double value)(Code)
	Answers the binary representation of the argument, as a long. Parameters: value - The double value to convert the bits of the double.

doubleToRawLongBits
native public static long doubleToRawLongBits(double value)(Code)
	Answers the binary representation of the argument, as a long. Parameters: value - The double value to convert the bits of the double.

doubleValue
public double doubleValue()(Code)
	Answers the receiver's value as a double. the receiver's value

equals
public boolean equals(Object object)(Code)
	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 `true` if the object is the same as this object`false` if it is different from this object See Also: Double.hashCode

floatValue
public float floatValue()(Code)
	Answers the float value which the receiver represents float the value of the receiver.

hashCode
public int hashCode()(Code)
	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. the receiver's hash See Also: Double.equals

intValue
public int intValue()(Code)
	Answers the receiver's value as an integer. the receiver's value as an integer

isInfinite
public boolean isInfinite()(Code)
	Answers true if the receiver represents an infinite quantity, and false otherwise. `true` if the argument is positive or negativeinfinity `false` if it is not an infinite value

isInfinite
public static boolean isInfinite(double d)(Code)
	Answers true if the argument represents an infinite quantity, and false otherwise. Parameters: d - value to check for infinitness. `true` if the argument is positive or negativeinfinity `false` if it is not an infinite value

isNaN
public boolean isNaN()(Code)
	Answers true if the receiver does not represent a valid float quantity. `true` if the argument is Not A Number`false` if it is a (potentially infinite) floatnumber

isNaN
public static boolean isNaN(double d)(Code)
	Answers true if the argument does not represent a valid double quantity. Parameters: d - value to check for numberness. `true` if the argument is Not A Number`false` if it is a (potentially infinite) doublenumber

longBitsToDouble
native public static double longBitsToDouble(long bits)(Code)
	Answers a double built from the binary representation given in the argument. Parameters: bits - the bits of the double the double which matches the bits

longValue
public long longValue()(Code)
	Answers the long value which the receiver represents long the value of the receiver.

parseDouble
public static double parseDouble(String string) throws NumberFormatException(Code)
	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 a double which would print as the argument

shortValue
public short shortValue()(Code)
	Answers the short value which the receiver represents short the value of the receiver.

toHexString
public static String toHexString(double d)(Code)
	Converts a `double` into a hexadecimal string representation. Parameters: d - The `double` to convert. The hexadecimal string representation of `f`. since: 1.5

toString
public String toString()(Code)
	Answers a string containing a concise, human-readable description of the receiver. a printable representation for the receiver.

toString
public static String toString(double d)(Code)
	Answers a string containing a printable representation of the argument. Parameters: d - the double to print a printable representation of the argument.

valueOf
public static Double valueOf(String string) throws NumberFormatException(Code)
	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 a double which would print as the argument

valueOf
public static Double valueOf(double d)(Code)
	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. A `Double` instance. since: 1.5

Methods inherited from java.lang.Number

public byte byteValue()(Code)(Java Doc)
abstract public double doubleValue()(Code)(Java Doc)
abstract public float floatValue()(Code)(Java Doc)
abstract public int intValue()(Code)(Java Doc)
abstract public long longValue()(Code)(Java Doc)
public short shortValue()(Code)(Java Doc)

Methods inherited from java.lang.Object

protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object object)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final public Class<? extends Object> getClass()(Code)(Java Doc)
public int hashCode()(Code)(Java Doc)
final public void notify()(Code)(Java Doc)
final public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final public void wait(long millis, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait(long millis) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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