org.danilopianini.lang

Class MathUtils

java.lang.Object

org.danilopianini.lang.MathUtils

public final class MathUtils
extends Object

Mathematical utilities that can not be found in Java Math or Apache FastMath.

Field Summary

Fields

Modifier and Type	Field and Description
static double	DOUBLE_EQUALITY_EPSILON Relative precision value under which two double values are considered to be equal by fuzzyEquals.

Constructor Summary

Constructors

Modifier	Constructor and Description
private	MathUtils()

Method Summary

Modifier and Type	Method and Description
static double	closestTo(double val, double v1, double v2)
static boolean	fuzzyEquals(double a, double b) Compares two double values, taking care of computing a relative error tolerance threshold.
static boolean	fuzzyGreaterEquals(double a, double b) Compares two double values, taking care of computing a relative error tolerance threshold.

Methods inherited from class java.lang.Object

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

Field Detail

DOUBLE_EQUALITY_EPSILON

public static final double DOUBLE_EQUALITY_EPSILON

Relative precision value under which two double values are considered to be equal by fuzzyEquals.

See Also:

Constant Field Values

Constructor Detail

MathUtils

private MathUtils()

Method Detail

fuzzyEquals

public static boolean fuzzyEquals(double a,
                                  double b)

Compares two double values, taking care of computing a relative error tolerance threshold.

Parameters:

a - first double

b - second double

Returns:

true if the double are equals with a precision order of DOUBLE_EQUALITY_EPSILON

fuzzyGreaterEquals

public static boolean fuzzyGreaterEquals(double a,
                                         double b)

Compares two double values, taking care of computing a relative error tolerance threshold.

Parameters:

a - first double

b - second double

Returns:

true if a > b, or if fuzzyEquals(a, b).

closestTo

public static double closestTo(double val,
                               double v1,
                               double v2)

Parameters:

val - the value

v1 - first value to compare to

v2 - second value to compare to

Returns:

v1 if val is closer to v1 than to v2, v2 otherwise