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https://issues.apache.org/jira/browse/IO-498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15144930#comment-15144930
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Federico Bonelli commented on IO-498:
-------------------------------------

Yes it is on a UTF8 system.

I'm afraid you are right, this is nothing we can solve in the Commons IO.

I wish this was fixable, but I agree to close it.

> FileUtils.directoryContains(File, File) returns wrong results when the file 
> name contains unreadable characters
> ---------------------------------------------------------------------------------------------------------------
>
>                 Key: IO-498
>                 URL: https://issues.apache.org/jira/browse/IO-498
>             Project: Commons IO
>          Issue Type: Bug
>          Components: Utilities
>    Affects Versions: 2.4
>         Environment: linux
>            Reporter: Federico Bonelli
>            Priority: Minor
>
> When testing for FileUtils.directoryContains(File, File) on a file which is 
> in fact contained in the given directory but has odd characters in the name, 
> the method returns wrong results.
> This file:
> {code:title=File name}
> bof@testcorso2015:~/tmp/test$ ls col* | xxd
> 0000000: 636f 6c74 e00a                           colt..
> {code}
> fails to be recognized as belonging to the current directory in this simple 
> snippet of code:
> {code:title=Snippet|borderStyle=solid}
> File[] files = new File(".").listFiles();
> for(File f : files){
>      System.out.println("contains " + f + " = " + 
> FileUtils.directoryContains(new File("."), f));
> }
> {code}



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