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https://issues.apache.org/jira/browse/IO-778?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17575180#comment-17575180
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Jiangwei Liu commented on IO-778:
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Hi [~rhochreiter] ,
I investigated it as your description, the following may be helpful to you:
java.lang.IllegalArgumentException is a RuntimeException, the method can ignore
it.
> FileUtils.copyFile(File srcFile, File destFile): Missing
> IllegalArgumentException in Javadoc
> --------------------------------------------------------------------------------------------
>
> Key: IO-778
> URL: https://issues.apache.org/jira/browse/IO-778
> Project: Commons IO
> Issue Type: Wish
> Components: Utilities
> Affects Versions: 2.11.0
> Reporter: Rainer Hochreiter
> Priority: Trivial
>
> Method {{FileUtils.copyFile(File srcFile, File destFile)}} throws
> {{{}IllegalArgumentException{}}}, when called with identical files. This is
> not documented in Javadoc.
> The {{IllegalArgumentException}} is thrown by
> {{FileUtils.requireCanonicalPathsNotEquals(File file1, File file2)}} in
> {{FileUtils.copyFile(File srcFile, File destFile, final CopyOption...
> copyOptions).}}
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