Class java.lang.Math 
All Packages  Class Hierarchy  This Package  Previous  Next  Index

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.

Variable Index

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

Method Index

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

Variables

o E 
  public final static double E
The float representation of the value E. E is equivalent to 2.7182818284590452354f in Java.
o PI 
  public final static double PI
The float representation of the value Pi. Pi is equivalent to 3.14159265358979323846f in Java.

Methods

o sin 
  public static double sin(double a)
Returns the trigonometric sine of an angle.
Parameters:
a - an assigned angle that is measured in radians
o cos 
  public static double cos(double a)
Returns the trigonometric cosine of an angle.
Parameters:
a - an assigned angle that is measured in radians
o tan 
  public static double tan(double a)
Returns the trigonometric tangent of an angle.
Parameters:
a - an assigned angle that is measured in radians
o 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
o 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
o 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.
o 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
o 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
o 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
o 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
o 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
o 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
o rint 
  public static double rint(double a)
Converts a double value into an integral value in double format.
Parameters:
a - an assigned double value
o 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).
o 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.
o 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
o 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
o 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.
o abs 
  public static int abs(int a)
Returns the absolute integer value of a.
Parameters:
a - an assigned integer value
o abs 
  public static long abs(long a)
Returns the absolute long value of a.
Parameters:
a - an assigned long value.
o abs 
  public static float abs(float a)
Returns the absolute float value of a.
Parameters:
a - an assigned float value
o abs 
  public static double abs(double a)
Returns the absolute double value of a.
Parameters:
a - an assigned double value
o 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
o 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
o 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
o 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
o 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
o 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
o 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
o 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 
All Packages  Class Hierarchy  This Package  Previous  Next  Index