org.xmlcml.euclid

Class RealComparator

java.lang.Object

org.xmlcml.euclid.RealComparator

All Implemented Interfaces:

Comparator<Double>

public class RealComparator
extends Object
implements Comparator<Double>

comparator for use with TreeSet<Double> and other tools which normally require equals(). epsilon is initially set to zero, so only exact equality matches

Author:

pm286

Constructor Summary

Constructors

Constructor and Description
RealComparator(double eps)

Method Summary

Modifier and Type	Method and Description
int	compare(Double d0, Double d1) if Math.abs(d0-d1) <= epsilon return -1 if either arg is null
void	setEpsilon(double epsilon) set the tolerance negative values are converted to positive

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail

RealComparator

public RealComparator(double eps)

Method Detail

compare

public int compare(Double d0,
                   Double d1)

if Math.abs(d0-d1) <= epsilon return -1 if either arg is null

Specified by:

compare in interface Comparator<Double>

setEpsilon

public void setEpsilon(double epsilon)

set the tolerance negative values are converted to positive

Parameters:

epsilon -