StrictMath

public final class StrictMath extends Object

The class StrictMath contains methods for performing basic numeric operations such as the elementary exponential, logarithm, square root, and trigonometric functions.

To help ensure portability of Java programs, the definitions of some of the numeric functions in this package require that they produce the same results as certain published algorithms. These algorithms are available from the well-known network library netlib as the package "Freely Distributable Math Library," fdlibm. These algorithms, which are written in the C programming language, are then to be understood as executed with all floating-point operations following the rules of Java floating-point arithmetic.

The Java math library is defined with respect to fdlibm version 5.3. Where fdlibm provides more than one definition for a function (such as acos), use the "IEEE 754 core function" version (residing in a file whose name begins with the letter e). The methods which require fdlibm semantics are sin, cos, tan, asin, acos, atan, exp, log, log10, cbrt, atan2, pow, sinh, cosh, tanh, hypot, expm1, and log1p.

Constant Summary

double E The double value that is closer than any other to e, the base of the natural logarithms.
double PI The double value that is closer than any other to pi, the ratio of the circumference of a circle to its diameter.

Public Method Summary

static double
IEEEremainder(double f1, double f2)
Computes the remainder operation on two arguments as prescribed by the IEEE 754 standard.
static long
abs(long a)
Returns the absolute value of a long value.
static int
abs(int a)
Returns the absolute value of an int value..
static float
abs(float a)
Returns the absolute value of a float value.
static double
abs(double a)
Returns the absolute value of a double value.
static double
acos(double a)
Returns the arc cosine of a value; the returned angle is in the range 0.0 through pi.
static int
addExact(int x, int y)
Returns the sum of its arguments, throwing an exception if the result overflows an int.
static long
addExact(long x, long y)
Returns the sum of its arguments, throwing an exception if the result overflows a long.
static double
asin(double a)
Returns the arc sine of a value; the returned angle is in the range -pi/2 through pi/2.
static double
atan(double a)
Returns the arc tangent of a value; the returned angle is in the range -pi/2 through pi/2.
static double
atan2(double y, double x)
Returns the angle theta from the conversion of rectangular coordinates (xy) to polar coordinates (r, theta).
static double
cbrt(double a)
Returns the cube root of a double value.
static double
ceil(double a)
Returns the smallest (closest to negative infinity) double value that is greater than or equal to the argument and is equal to a mathematical integer.
static float
copySign(float magnitude, float sign)
Returns the first floating-point argument with the sign of the second floating-point argument.
static double
copySign(double magnitude, double sign)
Returns the first floating-point argument with the sign of the second floating-point argument.
static double
cos(double a)
Returns the trigonometric cosine of an angle.
static double
cosh(double x)
Returns the hyperbolic cosine of a double value.
static double
exp(double a)
Returns Euler's number e raised to the power of a double value.
static double
expm1(double x)
Returns ex -1.
static double
floor(double a)
Returns the largest (closest to positive infinity) double value that is less than or equal to the argument and is equal to a mathematical integer.
static int
floorDiv(int x, int y)
Returns the largest (closest to positive infinity) int value that is less than or equal to the algebraic quotient.
static long
floorDiv(long x, long y)
Returns the largest (closest to positive infinity) long value that is less than or equal to the algebraic quotient.
static long
floorMod(long x, long y)
Returns the floor modulus of the long arguments.
static int
floorMod(int x, int y)
Returns the floor modulus of the int arguments.
static int
getExponent(double d)
Returns the unbiased exponent used in the representation of a double.
static int
getExponent(float f)
Returns the unbiased exponent used in the representation of a float.
static double
hypot(double x, double y)
Returns sqrt(x2 +y2) without intermediate overflow or underflow.
static double
log(double a)
Returns the natural logarithm (base e) of a double value.
static double
log10(double a)
Returns the base 10 logarithm of a double value.
static double
log1p(double x)
Returns the natural logarithm of the sum of the argument and 1.
static int
max(int a, int b)
Returns the greater of two int values.
static long
max(long a, long b)
Returns the greater of two long values.
static float
max(float a, float b)
Returns the greater of two float values.
static double
max(double a, double b)
Returns the greater of two double values.
static float
min(float a, float b)
Returns the smaller of two float values.
static double
min(double a, double b)
Returns the smaller of two double values.
static int
min(int a, int b)
Returns the smaller of two int values.
static long
min(long a, long b)
Returns the smaller of two long values.
static int
multiplyExact(int x, int y)
Returns the product of the arguments, throwing an exception if the result overflows an int.
static long
multiplyExact(long x, long y)
Returns the product of the arguments, throwing an exception if the result overflows a long.
static double
nextAfter(double start, double direction)
Returns the floating-point number adjacent to the first argument in the direction of the second argument.
static float
nextAfter(float start, double direction)
Returns the floating-point number adjacent to the first argument in the direction of the second argument.