com.bc.jexp.impl
Class ExtMath

java.lang.Object
  com.bc.jexp.impl.ExtMath

public class ExtMath
extends Object

An extension the the class.

Constructor Summary

ExtMath()

Method Summary

static boolean	feq(double x1, double x2, double eps) Performs a fuzzy equal operation for the two given arguments.
static boolean	fneq(double x1, double x2, double eps) Performs a fuzzy not-equal operation for the two given arguments.
static double	log10(double x) Deprecated. Use Java Math class
static double	sign(double a) Computes the signum of a given number.
static float	sign(float a) Computes the signum of a given number.
static int	sign(int a) Computes the signum of a given integer.
static long	sign(long a) Computes the signum of a given long integer.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExtMath

public ExtMath()

Method Detail

log10

@Deprecated
public static double log10(double x)

Deprecated. Use Java Math class

Returns the common logarithm, the logarithm with base 10 of a double value. Special cases:

If the argument is NaN or less than zero, then the result is NaN.

If the argument is positive infinity, then the result is positive infinity.

If the argument is positive zero or negative zero, then the result is negative infinity.

Parameters:

x - number greater than 0.0.

Returns:

the natural logarithm of a.

feq

public static boolean feq(double x1,
                          double x2,
                          double eps)

Performs a fuzzy equal operation for the two given arguments.

Parameters:

x1 - the first value

x2 - the second value

eps - the maximum deviation

Returns:

true, if x1 and x2 are equal

fneq

public static boolean fneq(double x1,
                           double x2,
                           double eps)

Performs a fuzzy not-equal operation for the two given arguments.

Parameters:

x1 - the first value

x2 - the second value

eps - the maximum deviation

Returns:

true, if x1 and x2 are not equal

sign

public static int sign(int a)

Computes the signum of a given integer. The method returns

-1, if a is negative

+1, if a is positive

0, if a is zero.

Parameters:

a - the number

Returns:

the signum of a

sign

public static long sign(long a)

Computes the signum of a given long integer. The method returns

-1, if a is negative

+1, if a is positive

0, if a is zero.

Parameters:

a - the number

Returns:

the signum of a

sign

public static float sign(float a)

Computes the signum of a given number. The method returns

-1, if a is negative

+1, if a is positive

0, if a is zero

NaN, if a is NaN.

Parameters:

a - the number

Returns:

the signum of a

sign

public static double sign(double a)

Computes the signum of a given number. The method returns

-1, if a is negative

+1, if a is positive

0, if a is zero

NaN, if a is NaN.

Parameters:

a - the number

Returns:

the signum of a