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java.lang
public final class

java.lang.StrictMath

java.lang.Object
	java.lang.StrictMath

Class StrictMath provides various numeric operations using the standards set by the known "Freely Distributable Math Library" (fdlibm). The standard is set by the January 4th, 1995 version of the library.

Summary

Constants

			Value
double	E	Standard math constant	2.718281828459045
double	PI	Standard math constant	3.141592653589793

Public Methods

static	double	IEEEremainder(double d1, double d2)
		Answers the remainder of dividing the first argument by the second using the IEEE 754 rules.
static	float	abs(float f)
		Answers the absolute value of the argument.
static	long	abs(long l)
		Answers the absolute value of the argument.
static	int	abs(int i)
		Answers the absolute value of the argument.
static	double	abs(double d)
		Answers the absolute value of the argument.
static	double	acos(double d)
		Answers the closest double approximation of the arc cosine of the argument
static	double	asin(double d)
		Answers the closest double approximation of the arc sine of the argument
static	double	atan(double d)
		Answers the closest double approximation of the arc tangent of the argument
static	double	atan2(double d1, double d2)
		Answers the closest double approximation of the arc tangent of the result of dividing the first argument by the second argument.
static	double	cbrt(double d)
		Answers the closest double approximation of the cube root of the argument.
static	double	ceil(double d)
		Answers the double conversion of the most negative (i.e.
static	double	cos(double d)
		Answers the closest double approximation of the cosine of the argument
static	double	cosh(double d)
		Answers the closest double approximation of the hyperbolic cosine of the argument.
static	double	exp(double d)
		Answers the closest double approximation of the raising "e" to the power of the argument
static	double	expm1(double d)
		Answers the closest double approximation of e^d - 1.
static	double	floor(double d)
		Answers the double conversion of the most positive (i.e.
static	double	hypot(double x, double y)
		Answers sqrt(x²+y²).
static	double	log(double d)
		Answers the closest double approximation of the natural logarithm of the argument
static	double	log10(double d)
		Answers the logarithm of the argument and the base is 10.
static	double	log1p(double d)
		Answers the closest double approximation of the natural logarithm of the sum of the argument and 1.
static	double	max(double d1, double d2)
		Answers the most positive (i.e.
static	int	max(int i1, int i2)
		Answers the most positive (i.e.
static	float	max(float f1, float f2)
		Answers the most positive (i.e.
static	long	max(long l1, long l2)
		Answers the most positive (i.e.
static	double	min(double d1, double d2)
		Answers the most negative (i.e.
static	long	min(long l1, long l2)
		Answers the most negative (i.e.
static	float	min(float f1, float f2)
		Answers the most negative (i.e.
static	int	min(int i1, int i2)
		Answers the most negative (i.e.
static	double	pow(double d1, double d2)
		Answers the closest double approximation of the result of raising the first argument to the power of the second.
static	double	random()
		Returns a pseudo-random number between 0.0 and 1.0.
static	double	rint(double d)
		Answers the double conversion of the result of rounding the argument to an integer.
static	long	round(double d)
		Answers the result of rounding the argument to an integer.
static	int	round(float f)
		Answers the result of rounding the argument to an integer.
static	double	signum(double d)
		Answers the signum function of the argument.
static	float	signum(float f)
		Answers the signum function of the argument.
static	double	sin(double d)
		Answers the closest double approximation of the sine of the argument
static	double	sinh(double d)
		Answers the closest double approximation of the hyperbolic sine of the argument.
static	double	sqrt(double d)
		Answers the closest double approximation of the square root of the argument
static	double	tan(double d)
		Answers the closest double approximation of the tangent of the argument
static	double	tanh(double d)
		Answers the closest double approximation of the hyperbolic tangent of the argument.
static	double	toDegrees(double angrad)
		Returns the measure in degrees of the supplied radian angle
static	double	toRadians(double angdeg)
		Returns the measure in radians of the supplied degree angle
static	float	ulp(float f)
		Answers the argument's ulp.
static	double	ulp(double d)
		Answers the argument's ulp.

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`).

Details

Constants

public static final double E

Standard math constant

Constant Value: 2.718281828459045

public static final double PI

Standard math constant

Constant Value: 3.141592653589793

Public Methods

public static double IEEEremainder(double d1, double d2)

Answers the remainder of dividing the first argument by the second using the IEEE 754 rules.

Parameters

d1	the numerator of the operation
d2	the denominator of the operation

Returns

the result of d1/d2.

public static float abs(float f)

Answers the absolute value of the argument.

Parameters

f	the value to be converted

Returns

the argument if it is positive, otherwise the negation of the argument.

public static long abs(long l)

Answers the absolute value of the argument.

Parameters

l	the value to be converted

Returns

the argument if it is positive, otherwise the negation of the argument.

public static int abs(int i)

Answers the absolute value of the argument.

Parameters

i	the value to be converted

Returns

the argument if it is positive, otherwise the negation of the argument.

public static double abs(double d)

Answers the absolute value of the argument.

Parameters

d	the value to be converted

Returns

the argument if it is positive, otherwise the negation of the argument.

public static double acos(double d)

Answers the closest double approximation of the arc cosine of the argument

Parameters

d	the value to compute acos of

Returns

the arc cosine of the argument.

public static double asin(double d)

Answers the closest double approximation of the arc sine of the argument

Parameters

d	the value to compute asin of

Returns

the arc sine of the argument.

public static double atan(double d)

Answers the closest double approximation of the arc tangent of the argument

Parameters

d	the value to compute atan of

Returns

the arc tangent of the argument.

public static double atan2(double d1, double d2)

Answers the closest double approximation of the arc tangent of the result of dividing the first argument by the second argument.

Parameters

d1	the numerator of the value to compute atan of
d2	the denominator of the value to compute atan of

Returns

the arc tangent of d1/d2.

public static double cbrt(double d)

Answers the closest double approximation of the cube root of the argument.

Parameters

d	the value to compute cube root of

Returns

the cube root of the argument.

public static double ceil(double d)

Answers the double conversion of the most negative (i.e. closest to negative infinity) integer value which is greater than the argument.

Parameters

d	the value to be converted

Returns

the ceiling of the argument.

public static double cos(double d)

Answers the closest double approximation of the cosine of the argument

Parameters

d	the value to compute cos of

Returns

the cosine of the argument.

public static double cosh(double d)

Answers the closest double approximation of the hyperbolic cosine of the argument.

Parameters

d	the value to compute hyperbolic cosine of

Returns

the hyperbolic cosine of the argument.

public static double exp(double d)

Answers the closest double approximation of the raising "e" to the power of the argument

Parameters

d	the value to compute the exponential of

Returns

the exponential of the argument.

public static double expm1(double d)

Answers the closest double approximation of e^d - 1. If the argument is very close to 0, it is much more accurate to use expm1(d)+1 than exp(d).

Parameters

d	the value to compute the e^d - 1 of

Returns

the e^d - 1 value of the argument.

public static double floor(double d)

Answers the double conversion of the most positive (i.e. closest to positive infinity) integer value which is less than the argument.

Parameters

d	the value to be converted

Returns

the ceiling of the argument.

public static double hypot(double x, double y)

Answers sqrt(x²+y²). The final result is without medium underflow or overflow.

Parameters

x	a double number
y	a double number

Returns

the sqrt(x²+y²) value of the arguments.

public static double log(double d)

Answers the closest double approximation of the natural logarithm of the argument

Parameters

d	the value to compute the log of

Returns

the natural logarithm of the argument.

public static double log10(double d)

Answers the logarithm of the argument and the base is 10.

Parameters

d	the value to compute the base 10 log of

Returns

the base 10 logarithm of the argument.

public static double log1p(double d)

Answers the closest double approximation of the natural logarithm of the sum of the argument and 1. If the argument is very close to 0, it is much more accurate to use log1p(d) than log(1.0+d).

Parameters

d	the value to compute the ln(1+d) of

Returns

the natural logarithm of the sum of the argument and 1.

public static double max(double d1, double d2)

Answers the most positive (i.e. closest to positive infinity) of the two arguments.

Parameters

d1	the first argument to check
d2	the second argument

Returns

the larger of d1 and d2.

public static int max(int i1, int i2)

Answers the most positive (i.e. closest to positive infinity) of the two arguments.

Parameters

i1	the first argument to check
i2	the second argument

Returns

the larger of i1 and i2.

public static float max(float f1, float f2)

Answers the most positive (i.e. closest to positive infinity) of the two arguments.

Parameters

f1	the first argument to check
f2	the second argument

Returns

the larger of f1 and f2.

public static long max(long l1, long l2)

Answers the most positive (i.e. closest to positive infinity) of the two arguments.

Parameters

l1	the first argument to check
l2	the second argument

Returns

the larger of l1 and l2.

public static double min(double d1, double d2)

Answers the most negative (i.e. closest to negative infinity) of the two arguments.

Parameters

d1	the first argument to check
d2	the second argument

Returns

the smaller of d1 and d2.

public static long min(long l1, long l2)

Answers the most negative (i.e. closest to negative infinity) of the two arguments.

Parameters

l1	the first argument to check
l2	the second argument

Returns

the smaller of l1 and l2.

public static float min(float f1, float f2)

Answers the most negative (i.e. closest to negative infinity) of the two arguments.

Parameters

f1	the first argument to check
f2	the second argument

Returns

the smaller of f1 and f2.

public static int min(int i1, int i2)

Answers the most negative (i.e. closest to negative infinity) of the two arguments.

Parameters

i1	the first argument to check
i2	the second argument

Returns

the smaller of i1 and i2.

public static double pow(double d1, double d2)

Answers the closest double approximation of the result of raising the first argument to the power of the second.

Parameters

d1	the base of the operation.
d2	the exponent of the operation.

Returns

d1 to the power of d2

public static double random()

Returns a pseudo-random number between 0.0 and 1.0.

Returns

a pseudo-random number

public static double rint(double d)

Answers the double conversion of the result of rounding the argument to an integer.

Parameters

d	the value to be converted

Returns

the closest integer to the argument (as a double).

public static long round(double d)

Answers the result of rounding the argument to an integer.

Parameters

d	the value to be converted

Returns

the closest integer to the argument.

public static int round(float f)

Answers the result of rounding the argument to an integer.

Parameters

f	the value to be converted

Returns

the closest integer to the argument.

public static double signum(double d)

Answers the signum function of the argument. If the argument is less than zero, it answers -1.0. If greater than zero, 1.0 is returned. It returns zero if the argument is also zero.

Parameters

d	the value to compute signum function of

Returns

the value of the signum function.

public static float signum(float f)

Answers the signum function of the argument. If the argument is less than zero, it answers -1.0. If greater than zero, 1.0 is returned. It returns zero if the argument is also zero.

Parameters

f	the value to compute signum function of

Returns

the value of the signum function.

public static double sin(double d)

Answers the closest double approximation of the sine of the argument

Parameters

d	the value to compute sin of

Returns

the sine of the argument.

public static double sinh(double d)

Answers the closest double approximation of the hyperbolic sine of the argument.

Parameters

d	the value to compute hyperbolic sine of

Returns

the hyperbolic sine of the argument.

public static double sqrt(double d)

Answers the closest double approximation of the square root of the argument

Parameters

d	the value to compute sqrt of

Returns

the square root of the argument.

public static double tan(double d)

Answers the closest double approximation of the tangent of the argument

Parameters

d	the value to compute tan of

Returns

the tangent of the argument.

public static double tanh(double d)

Answers the closest double approximation of the hyperbolic tangent of the argument. The absolute value is always less than 1.

Parameters

d	the value to compute hyperbolic tangent of

Returns

the hyperbolic tangent of the argument.

public static double toDegrees(double angrad)

Returns the measure in degrees of the supplied radian angle

Parameters

angrad	an angle in radians

Returns

the degree measure of the angle.

public static double toRadians(double angdeg)

Returns the measure in radians of the supplied degree angle

Parameters

angdeg	an angle in degrees

Returns

the radian measure of the angle.

public static float ulp(float f)

Answers the argument's ulp. The size of a ulp of a float value is the positive distance between this value and the float value next larger in magnitude. For non-NaN x, ulp(-x) == ulp(x).

Parameters

f	the floating-point value to compute ulp of

Returns

the size of a ulp of the argument.

public static double ulp(double d)

Answers the argument's ulp. The size of a ulp of a double value is the positive distance between this value and the double value next larger in magnitude. For non-NaN x, ulp(-x) == ulp(x).

Parameters

d	the floating-point value to compute ulp of

Returns

the size of a ulp of the argument.


e.g. "intent" or "activity"

Android - An Open Handset Alliance Project

Documentation

Goodies

java.lang.StrictMath

Summary

Constants

Public Methods

Methods inherited from class java.lang.Object

Details

Constants

public static final double E

public static final double PI

Public Methods

public static double IEEEremainder(double d1, double d2)

Parameters

Returns

public static float abs(float f)

Parameters

Returns

public static long abs(long l)

Parameters

Returns

public static int abs(int i)

Parameters

Returns

public static double abs(double d)

Parameters

Returns

public static double acos(double d)

Parameters

Returns

public static double asin(double d)

Parameters

Returns

public static double atan(double d)

Parameters

Returns

public static double atan2(double d1, double d2)

Parameters

Returns

public static double cbrt(double d)

Parameters

Returns

public static double ceil(double d)

Parameters

Returns

public static double cos(double d)

Parameters

Returns

public static double cosh(double d)

Parameters

Returns

public static double exp(double d)

Parameters

Returns

public static double expm1(double d)

Parameters

Returns

public static double floor(double d)

Parameters

Returns

public static double hypot(double x, double y)

Parameters

Returns

public static double log(double d)

Parameters

Returns

public static double log10(double d)

Parameters

Returns

public static double log1p(double d)

Parameters

Returns

public static double max(double d1, double d2)

Parameters

Returns

public static int max(int i1, int i2)

Parameters

Returns

public static float max(float f1, float f2)