RFR: 8220816: (fs) Files.createDirectory should make it more obvious that it fails when the directory already exists [v3]

[Brian Burkhalter]

On Wed, 19 Nov 2025 01:35:29 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

> I don't know that "otherwise" has any meaning here.

No, I also don't think it does.

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PR Review Comment: https://git.openjdk.org/jdk/pull/28378#discussion_r2542788284