edu.neu.ccs.util
Class MathUtilities

java.lang.Object
  |
  +--edu.neu.ccs.util.MathUtilities

public class MathUtilities

extends Object

The class MathUtilities collects several useful static mathematical functions. The class may be viewed as an extension of the tools found in java.lang.Math.

Since:

1.2

Constructor Summary

MathUtilities()

Method Summary

static double	acosdeg(double value) Return the arc cosine in degrees of the specified input value in the range -1 to +1.
static double	asindeg(double value) Return the arc sine in degrees of the specified input value in the range -1 to +1.
static double	atan2deg(double y, double x) Return the polar angle in degrees of the point (x, y) where the y-coordinate is given first and the x-coordinate second.
static double	atandeg(double value) Return the arc tangent in degrees of the specified input value.
static double	cosdeg(double degrees) Return the cosine of the given angle specified in degrees.
static int	GCD(int a, int b) Returns the greatest common divisor of the int inputs a and b.
static long	GCD(long a, long b) Returns the greatest common divisor of the long inputs a and b.
static int	LCM(int a, int b) Returns the least common multiple of the int inputs a and b.
static long	LCM(long a, long b) Returns the least common multiple of the long inputs a and b.
static int	modulus(int number, int base) Returns the modulus of int number relative to int base.
static long	modulus(long number, long base) Returns the modulus of long number relative to long base.
static double	randomDouble(double min, double max) Return a random double r in the range min <= r <= max.
static int	randomInt(int min, int max) Return a random int r in the range min <= r <= max.
static double	sindeg(double degrees) Return the sine of the given angle specified in degrees.
static double	tandeg(double degrees) Return the tangent of the given angle specified in degrees.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MathUtilities

public MathUtilities()

Method Detail

randomInt

public static int randomInt(int min,
                            int max)

Return a random int r in the range min <= r <= max.

randomDouble

public static double randomDouble(double min,
                                  double max)

Return a random double r in the range min <= r <= max.

sindeg

public static double sindeg(double degrees)

Return the sine of the given angle specified in degrees.

cosdeg

public static double cosdeg(double degrees)

Return the cosine of the given angle specified in degrees.

tandeg

public static double tandeg(double degrees)

Return the tangent of the given angle specified in degrees.

asindeg

public static double asindeg(double value)

Return the arc sine in degrees of the specified input value in the range -1 to +1.

acosdeg

public static double acosdeg(double value)

Return the arc cosine in degrees of the specified input value in the range -1 to +1.

atandeg

public static double atandeg(double value)

Return the arc tangent in degrees of the specified input value.

atan2deg

public static double atan2deg(double y,
                              double x)

Return the polar angle in degrees of the point (x, y) where the y-coordinate is given first and the x-coordinate second.

Parameters:

y - the y-coordinate of the point

x - the x-coordinate of the point

GCD

public static int GCD(int a,
                      int b)

Returns the greatest common divisor of the int inputs a and b.

The return value will be positive or zero and will be zero only if both a and b are zero.

GCD

public static long GCD(long a,
                       long b)

Returns the greatest common divisor of the long inputs a and b.

The return value will be positive or zero and will be zero only if both a and b are zero.

LCM

public static int LCM(int a,
                      int b)

Returns the least common multiple of the int inputs a and b.

The return value will be positive or zero and will be zero only if both a and b are zero.

LCM

public static long LCM(long a,
                       long b)

Returns the least common multiple of the long inputs a and b.

The return value will be positive or zero and will be zero only if both a and b are zero.

modulus

public static int modulus(int number,
                          int base)

Returns the modulus of int number relative to int base.

Returns n such that n is congruent to number modulo base and 0 <= n < Math.abs(base).

Throws ArithmeticException if base is zero.

modulus

public static long modulus(long number,
                           long base)

Returns the modulus of long number relative to long base.

Returns n such that n is congruent to number modulo base and 0 <= n < Math.abs(base).

Throws ArithmeticException if base is zero.