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https://issues.apache.org/jira/browse/LANG-1793?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gary D. Gregory resolved LANG-1793.
-----------------------------------
Fix Version/s: 3.20.1
Resolution: Fixed
[~zhongxin]
PR merged. Thank you. Please review git master or snapshot builds.
Do you see any other documentation issues?
> Incorrect Javadoc description in CharUtils.isAsciiAlphanumeric()
> ----------------------------------------------------------------
>
> Key: LANG-1793
> URL: https://issues.apache.org/jira/browse/LANG-1793
> Project: Commons Lang
> Issue Type: Bug
> Components: lang.*
> Affects Versions: 3.20.0
> Reporter: Zhongxin Yan
> Priority: Major
> Fix For: 3.20.1
>
> Attachments: image-2025-11-25-23-58-04-347.png
>
>
> The Javadoc of the {{isAsciiAlphanumeric}} method in {{CharUtils}} contains
> an incorrect description.
> The first sentence currently states:
> {quote}“Tests whether the character is ASCII 7 bit numeric.”
> {quote}
> However, the actual implementation checks whether the character is
> {*}alphanumeric{*}, meaning it returns {{true}} for both:
> * alphabetic characters ({{{}A–Z{}}}, {{{}a–z{}}}), and
> * numeric characters ({{{}0–9{}}}).
> This mismatch between the Javadoc and the method behavior is misleading and
> may cause confusion for API users. The documentation should be updated to
> reflect that the method checks for ASCII alphanumeric characters, not numeric
> characters only.
> https://github.com/apache/commons-lang/pull/1501
> !image-2025-11-25-23-58-04-347.png|width=472,height=347!
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