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https://issues.apache.org/jira/browse/LANG-1806?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18047992#comment-18047992
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Jagdish Singh Bisht commented on LANG-1806:
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I have opened a PR to address this issue:
[https://github.com/apache/commons-lang/pull/1546]
This complete the existing TODOs in the test suite and allows floating-point
suffixes (f/F/d/D) only when they appear as the final character, as a small
follow-up to LANG-1695.
> NumberUtils.isParsable("1.f") should return true
> ------------------------------------------------
>
> Key: LANG-1806
> URL: https://issues.apache.org/jira/browse/LANG-1806
> Project: Commons Lang
> Issue Type: Bug
> Reporter: Gary D. Gregory
> Priority: Major
> Attachments: image-2025-12-29-12-57-58-544.png
>
>
> {{NumberUtils.isParsable("1.f")}} should return true because
> {{Float.parseFloat("1.f")}} return {{1.0}}
> Same for {{Double}} and {{d}} since these work:
> * Double.parseDouble("1.f")
> * Double.parseDouble("1.d")
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