RFR: 8335912: Add an operation mode to the jar command when extracting to not overwriting existing files [v4]

[Eirik Bjørsnøs]

On Fri, 27 Sep 2024 01:41:33 GMT, Henry Jen <henryjen at openjdk.org> wrote:

>> This PR support a -k, --keep options like tar that allows jar to avoid override existing files.
>
> Henry Jen has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Address review feedbacks

Is `compiler` label needed? The `jar` tool belongs in `core-libs`, right? This PR does not seem to touch anything in the compiler area?

-------------

PR Comment: https://git.openjdk.org/jdk/pull/21141#issuecomment-2384977590