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https://issues.apache.org/jira/browse/LANG-600?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12842219#action_12842219
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Henri Yandell commented on LANG-600:
------------------------------------
Confirmed.
> Javadoc is incorrect for public static int lastIndexOf(String str, String
> searchStr)
> ------------------------------------------------------------------------------------
>
> Key: LANG-600
> URL: https://issues.apache.org/jira/browse/LANG-600
> Project: Commons Lang
> Issue Type: Task
> Components: lang.*
> Affects Versions: 2.4
> Reporter: Sean Montgomery
> Priority: Trivial
> Fix For: 3.0
>
>
> The javadoc's examples show how indexOf should work not lastIndexOf.
> StringUtils.lastIndexOf(null, *) = -1
> StringUtils.lastIndexOf(*, null) = -1
> StringUtils.lastIndexOf("", "") = 0
> StringUtils.lastIndexOf("aabaabaa", "a") = 0
> StringUtils.lastIndexOf("aabaabaa", "b") = 2
> StringUtils.lastIndexOf("aabaabaa", "ab") = 1
> StringUtils.lastIndexOf("aabaabaa", "") = 8
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