StrictMath (Java Platform SE 7 )

java.lang.Object
- java.lang.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.

Since:

1.3

Field Summary

Fields
Modifier and Type	Field and Description
`static double`	`E` The `double` value that is closer than any other to e, the base of the natural logarithms.
`static double`	`PI` The `double` value that is closer than any other to pi, the ratio of the circumference of a circle to its diameter.

Method Summary

Methods
Modifier and Type	Method and Description
`static double`	`abs(double a)` Returns the absolute value of a `double` value.
`static float`	`abs(float a)` Returns the absolute value of a `float` value.
`static int`	`abs(int a)` Returns the absolute value of an `int` value..
`static long`	`abs(long a)` Returns the absolute value of a `long` 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 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 (`x`, `y`) 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 double`	`copySign(double magnitude, double sign)` Returns the first floating-point argument with the sign of the second floating-point argument.
`static float`	`copySign(float magnitude, float 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 e^x -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`	`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`	`IEEEremainder(double f1, double f2)` Computes the remainder operation on two arguments as prescribed by the IEEE 754 standard.
`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 double`	`max(double a, double b)` Returns the greater of two `double` values.
`static float`	`max(float a, float b)` Returns the greater of two `float` values.
`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 double`	`min(double a, double b)` Returns the smaller of two `double` values.
`static float`	`min(float a, float b)` Returns the smaller of two `float` 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 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.
`static double`	`nextUp(double d)` Returns the floating-point value adjacent to `d` in the direction of positive infinity.
`static float`	`nextUp(float f)` Returns the floating-point value adjacent to `f` in the direction of positive infinity.
`static double`	`pow(double a, double b)` Returns the value of the first argument raised to the power of the second argument.
`static double`	`random()` Returns a `double` value with a positive sign, greater than or equal to `0.0` and less than `1.0`.
`static double`	`rint(double a)` Returns the `double` value that is closest in value to the argument and is equal to a mathematical integer.
`static long`	`round(double a)` Returns the closest `long` to the argument, with ties rounding up.
`static int`	`round(float a)` Returns the closest `int` to the argument, with ties rounding up.
`static double`	`scalb(double d, int scaleFactor)` Return `d` × 2^scaleFactor rounded as if performed by a single correctly rounded floating-point multiply to a member of the double value set.
`static float`	`scalb(float f, int scaleFactor)` Return `f` × 2^scaleFactor rounded as if performed by a single correctly rounded floating-point multiply to a member of the float value set.
`static double`	`signum(double d)` Returns the signum function of the argument; zero if the argument is zero, 1.0 if the argument is greater than zero, -1.0 if the argument is less than zero.
`static float`	`signum(float f)` Returns the signum function of the argument; zero if the argument is zero, 1.0f if the argument is greater than zero, -1.0f if the argument is less than zero.
`static double`	`sin(double a)` Returns the trigonometric sine of an angle.
`static double`	`sinh(double x)` Returns the hyperbolic sine of a `double` value.
`static double`	`sqrt(double a)` Returns the correctly rounded positive square root of a `double` value.
`static double`	`tan(double a)` Returns the trigonometric tangent of an angle.
`static double`	`tanh(double x)` Returns the hyperbolic tangent of a `double` value.
`static double`	`toDegrees(double angrad)` Converts an angle measured in radians to an approximately equivalent angle measured in degrees.
`static double`	`toRadians(double angdeg)` Converts an angle measured in degrees to an approximately equivalent angle measured in radians.
`static double`	`ulp(double d)` Returns the size of an ulp of the argument.
`static float`	`ulp(float f)` Returns the size of an ulp of the argument.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - E
```
public static final double E
```
    The double value that is closer than any other to e, the base of the natural logarithms.
    
    See Also:
    Constant Field Values
  - PI
```
public static final double PI
```
    The double value that is closer than any other to pi, the ratio of the circumference of a circle to its diameter.
    
    See Also:
    Constant Field Values
- Method Detail
  - sin
```
public static double sin(double a)
```
    Returns the trigonometric sine of an angle. Special cases:
    - If the argument is NaN or an infinity, then the result is NaN.
    - If the argument is zero, then the result is a zero with the same sign as the argument.
    Parameters:
    a - an angle, in radians.
    
    Returns:
    the sine of the argument.

Class StrictMath

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

E

PI

Method Detail

sin