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https://issues.apache.org/jira/browse/MATH-252?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Luc Maisonobe resolved MATH-252.
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Resolution: Fixed
fixed in subversion as of r759725
> Fraction.comparTo returns 0 for some differente fractions
> ---------------------------------------------------------
>
> Key: MATH-252
> URL: https://issues.apache.org/jira/browse/MATH-252
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 1.2
> Reporter: Luc Maisonobe
> Assignee: Luc Maisonobe
> Fix For: 2.0
>
>
> If two different fractions evaluate to the same double due to limited
> precision,
> the compareTo methode returns 0 as if they were identical.
> {code}
> // value is roughly PI - 3.07e-18
> Fraction pi1 = new Fraction(1068966896, 340262731);
> // value is roughly PI + 1.936e-17
> Fraction pi2 = new Fraction( 411557987, 131002976);
> System.out.println(pi1.doubleValue() - pi2.doubleValue()); // exactly 0.0 due
> to limited IEEE754 precision
> System.out.println(pi1.compareTo(pi2)); // display 0 instead of a negative
> value
> {code}
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