Class java.lang.Math

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Class java.lang.Math

java.lang.Object
|
   +----java.lang.Math

public final class Math
extends Object

The standard Math library. For the methods in this Class, error handling for out-of-range or immeasurable results are platform dependent. This class cannot be subclassed or instantiated because all methods and variables are static.

E: The float representation of the value E.
PI: The float representation of the value Pi.

abs(double): Returns the absolute double value of a.
abs(float): Returns the absolute float value of a.
abs(int): Returns the absolute integer value of a.
abs(long): Returns the absolute long value of a.
acos(double): Returns the arc cosine of a, in the range of 0.0 through Pi.
asin(double): Returns the arc sine of a, in the range of -Pi/2 through Pi/2.
atan(double): Returns the arc tangent of a, in the range of -Pi/2 through Pi/2.
atan2(double, double): Converts rectangular coordinates (a, b) to polar (r, theta).
ceil(double): Returns the "ceiling" or smallest whole number greater than or equal to a.
cos(double): Returns the trigonometric cosine of an angle.
exp(double): Returns the exponential number e(2.718...) raised to the power of a.
floor(double): Returns the "floor" or largest whole number less than or equal to a.
IEEEremainder(double, double): Returns the remainder of f1 divided by f2 as defined by IEEE 754.
log(double): Returns the natural logarithm (base e) of a.
max(double, double): Takes two double values, a and b, and returns the greater number of the two.
max(float, float): Takes two float values, a and b, and returns the greater number of the two.
max(int, int): Takes two int values, a and b, and returns the greater number of the two.
max(long, long): Takes two long values, a and b, and returns the greater number of the two.
min(double, double): Takes two double values, a and b, and returns the smallest number of the two.
min(float, float): Takes two float values, a and b, and returns the smallest number of the two.
min(int, int): Takes two integer values, a and b, and returns the smallest number of the two.
min(long, long): Takes two long values, a and b, and returns the smallest number of the two.
pow(double, double): Returns the number a raised to the power of b.
random(): Generates a random number between 0.0 and 1.0.
rint(double): Converts a double value into an integral value in double format.
round(double): Rounds off a double value by first adding 0.5 to it and then returning the largest integer that is less than or equal to this new value.
round(float): Rounds off a float value by first adding 0.5 to it and then returning the largest integer that is less than or equal to this new value.
sin(double): Returns the trigonometric sine of an angle.
sqrt(double): Returns the square root of a.
tan(double): Returns the trigonometric tangent of an angle.

public final static double E

The float representation of the value E. E is equivalent to 2.7182818284590452354f in Java.

public final static double PI

The float representation of the value Pi. Pi is equivalent to 3.14159265358979323846f in Java.

sin

public static double sin(double a)

Returns the trigonometric sine of an angle.

Parameters:: a - an assigned angle that is measured in radians

cos

public static double cos(double a)

Returns the trigonometric cosine of an angle.

Parameters:: a - an assigned angle that is measured in radians

tan

public static double tan(double a)

Returns the trigonometric tangent of an angle.

Parameters:: a - an assigned angle that is measured in radians

asin

public static double asin(double a)

Returns the arc sine of a, in the range of -Pi/2 through Pi/2.

Parameters:: a - (-1.0) <= a <= 1.0

acos

public static double acos(double a)

Returns the arc cosine of a, in the range of 0.0 through Pi.

Parameters:: a - (-1.0) <= a <= 1.0

atan

public static double atan(double a)

Returns the arc tangent of a, in the range of -Pi/2 through Pi/2.

Parameters:: a - an assigned value
Returns:: the arc tangent of a.

exp

public static double exp(double a)

Returns the exponential number e(2.718...) raised to the power of a.

Parameters:: a - an assigned value

log

public static double log(double a)

Returns the natural logarithm (base e) of a.

Parameters:: a - a is a number greater than 0.0

sqrt

public static double sqrt(double a)

Returns the square root of a.

Parameters:: a - a is a number greater than or equal to 0.0

IEEEremainder

public static double IEEEremainder(double f1,
                                     double f2)

Returns the remainder of f1 divided by f2 as defined by IEEE 754.

Parameters:: f1 - the dividend; f2 - the divisor

ceil

public static double ceil(double a)

Returns the "ceiling" or smallest whole number greater than or equal to a.

Parameters:: a - an assigned value

floor

public static double floor(double a)

Returns the "floor" or largest whole number less than or equal to a.

Parameters:: a - an assigned value

rint

public static double rint(double a)

Converts a double value into an integral value in double format.

Parameters:: a - an assigned double value

atan2

public static double atan2(double a,
                             double b)

Converts rectangular coordinates (a, b) to polar (r, theta). This method computes the phase theta by computing an arc tangent of b/a in the range of -Pi to Pi.

Parameters:: a - an assigned value; b - an assigned value
Returns:: the polar coordinates (r, theta).

pow

public static double pow(double a,
                           double b)

Returns the number a raised to the power of b. If (a == 0.0), then b must be greater than 0.0; otherwise you will throw an exception. An exception will also occur if (a <= 0.0) and b is not equal to a whole number.

Parameters:: a - an assigned value with the exceptions: (a == 0.0) -> (b > 0.0) && (a <= 0.0) -> (b == a whole number); b - an assigned value with the exceptions: (a == 0.0) -> (b > 0.0) && (a <= 0.0) -> (b == a whole number)
Throws: ArithmeticException: If (a == 0.0) and (b <= 0.0) .
Throws: ArithmeticException: If (a <= 0.0) and b is not equal to a whole number.

round

public static int round(float a)

Rounds off a float value by first adding 0.5 to it and then returning the largest integer that is less than or equal to this new value.

Parameters:: a - the value to be rounded off

round

public static long round(double a)

Rounds off a double value by first adding 0.5 to it and then returning the largest integer that is less than or equal to this new value.

Parameters:: a - the value to be rounded off

random

public static synchronized double random()

Generates a random number between 0.0 and 1.0.

Random number generators are often referred to as pseudorandom number generators because the numbers produced tend to repeat themselves after a period of time.

Returns:: a pseudorandom double between 0.0 and 1.0.

abs

public static int abs(int a)

Returns the absolute integer value of a.

Parameters:: a - an assigned integer value

abs

public static long abs(long a)

Returns the absolute long value of a.

Parameters:: a - an assigned long value.

abs

public static float abs(float a)

Returns the absolute float value of a.

Parameters:: a - an assigned float value

abs

public static double abs(double a)

Returns the absolute double value of a.

Parameters:: a - an assigned double value

max

public static int max(int a,
                        int b)

Takes two int values, a and b, and returns the greater number of the two.

Parameters:: a - an integer value to be compared; b - an integer value to be compared

max

public static long max(long a,
                         long b)

Takes two long values, a and b, and returns the greater number of the two.

Parameters:: a - a long value to be compared; b - a long value to be compared

max

public static float max(float a,
                          float b)

Takes two float values, a and b, and returns the greater number of the two.

Parameters:: a - a float value to be compared; b - a float value to be compared

max

public static double max(double a,
                           double b)

Takes two double values, a and b, and returns the greater number of the two.

Parameters:: a - a double value to be compared; b - a double value to be compared

min

public static int min(int a,
                        int b)

Takes two integer values, a and b, and returns the smallest number of the two.

Parameters:: a - an integer value to be compared; b - an integer value to be compared

min

public static long min(long a,
                         long b)

Takes two long values, a and b, and returns the smallest number of the two.

Parameters:: a - a long value to be compared; b - a long value to be compared

min

public static float min(float a,
                          float b)

Takes two float values, a and b, and returns the smallest number of the two.

Parameters:: a - a float value to be compared; b - a float value to be compared

min

public static double min(double a,
                           double b)

Takes two double values, a and b, and returns the smallest number of the two.

Parameters:: a - a double value to be compared; b - a double value to be compared

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