RFR: 8298318: (fs) APIs for handling filename extensions [v2]

[Roger Riggs]

On Mon, 20 Nov 2023 23:30:45 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

>> Add to `java.nio.file.Path` a method `getExtension` to retrieve the `Path`'s extension, and companion methods `removeExtension` and `addExtension`.
>
> Brian Burkhalter has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:
> 
>  - 8298318: Correct type in path.getExtension spec
>  - Merge
>  - 8298318: (fs) APIs for handling filename extensions

I think you're making things too complicated.   
The more I think of it, I think it needs to be simpler.
Developers that are working with dot-files, know it and won't be looking for file extensions at all.
They also know whether the files they are working with have extensions and know how to do it themselves but like a simple function to replace or remove the extension.
The API will be practical and easy to use even if it ignores the leading dots (as do Guava and Apache Commons).
It will also be consistent with other APIs in OpenJDK that look at extensions including Files.probeContentType.

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PR Comment: https://git.openjdk.org/jdk/pull/16226#issuecomment-1834513172