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Docs for File.renameTo() say: "Many aspects of the behavior of this method are inherently platform-dependent: The rename (...) might not be atomic..."

That is pretty vague and I need disambiguation. Is this method atomic in Oracle Java 6 on WinXP and newer?

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  • I suspect it depends on whether you are renaming a file in a directory, moving a file around a file system or moving a file between file systems (which is a copy and a delete) Commented Nov 18, 2011 at 15:03

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Based on this answerxpost

"Win32 does not guarantee atomic file meta data operations. I'd provide a citation, but there is none - that fact that there's no written or documented guarantee means as much"

No.

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Since win32 historically didn't provide any support for atomic file moves/renames, that's highly unlikely.

They added functions for this with Vista, so the new file functions in Java7 may actually use those - no idea. But for XP you're out of luck.

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