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From "Phil Steitz (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MATH-151) MathUtils.round incorrect result
Date Tue, 06 Jun 2006 13:42:30 GMT
    [ http://issues.apache.org/jira/browse/MATH-151?page=comments#action_12414956 ] 

Phil Steitz commented on MATH-151:
----------------------------------

Thanks for reporting this bug.  Could be we want to reconsider the changes applied to address
http://issues.apache.org/jira/browse/MATH-32.  Patches welcome!

> MathUtils.round incorrect result
> --------------------------------
>
>          Key: MATH-151
>          URL: http://issues.apache.org/jira/browse/MATH-151
>      Project: Commons Math
>         Type: Bug

>     Versions: 1.1 Final
>  Environment: Win2K, Sun JDK1.5.0_05 b05
>     Reporter: Buza Zoltán

>
> MathUtils.round(39.245, 2) results 39.24, however it should be 39.25, with default rounding
mode BigDecimal.ROUND_HALF_UP.
> I found that internally MathUtils.round multiplies the given number by 10^scale.
>  39.245 * 100.0 results 3924.49999...5 , and after this the calculation is not correct
any more.

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