com.evanmclean.evlib.misc
Class Dbl

java.lang.Object
  com.evanmclean.evlib.misc.Dbl

public final class Dbl
extends Object

Functions for checking the values of doubles are 'close enough'.

Author:

Evan M^cLean M^cLean Computer Services (see the overview for copyright and licensing.)

Method Summary

static boolean	equiv(double lhs, double rhs) Returns true if the difference between the two doubles is less than 0.000001.
static boolean	equiv(double lhs, double rhs, int tolerance) Returns true if the difference between the two doubles is within a certain tolerance.
static boolean	zero(double val) Return true if the value is less than +/-0.000001.
static boolean	zero(double val, int tolerance) Return true if the value is within a certain range, either side of zero.

Methods inherited from class java.lang.Object

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

Method Detail

equiv

public static boolean equiv(double lhs,
                            double rhs)

Returns true if the difference between the two doubles is less than 0.000001.

Parameters:

lhs -

rhs -

Returns:

Returns true if the difference between the two doubles is less than 0.000001.

equiv

public static boolean equiv(double lhs,
                            double rhs,
                            int tolerance)

Returns true if the difference between the two doubles is within a certain tolerance.

Parameters:

lhs -

rhs -

tolerance -

Returns:

Returns true if the difference between the two doubles is less than Math.pow(10, -tolerance).

zero

public static boolean zero(double val)

Return true if the value is less than +/-0.000001.

Parameters:

val -

Returns:

Return true if the value is less than +/-0.000001.

zero

public static boolean zero(double val,
                           int tolerance)

Return true if the value is within a certain range, either side of zero.

Parameters:

val -

tolerance -

Returns:

Return true if the value is less than +/- Math.pow(10.0, -tolerance)