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https://issues.apache.org/jira/browse/LANG-1003?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13987488#comment-13987488
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Benedikt Ritter commented on LANG-1003:
---------------------------------------
Makes sense to me.
> DurationFormatUtils are not able to handle negative durations/periods
> ---------------------------------------------------------------------
>
> Key: LANG-1003
> URL: https://issues.apache.org/jira/browse/LANG-1003
> Project: Commons Lang
> Issue Type: Bug
> Components: lang.text.*
> Affects Versions: 3.3.2
> Reporter: Michael Osipov
> Priority: Critical
> Fix For: Patch Needed
>
>
> It spits out complete garbage.
> {code}
> System.out.println(DurationFormatUtils.formatDurationHMS(-3454));
> System.out.println(DurationFormatUtils.formatPeriodISO(4000, 3000));
> {code}
> {noformat}
> 0:00:-3.-454
> P-1Y11M30DT23H59M59.000S
> {noformat}
> I should throw an {{IllegalArgumentException}} if duration is < 0 or period
> diff is < 0.
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