RFR: 8345431: Improve jar --validate to detect duplicate or invalid entries [v9]

[Henry Jen]

On Sat, 17 May 2025 01:27:38 GMT, Henry Jen <henryjen at openjdk.org> wrote:

>> This PR check the jar file to ensure entries are consistent from the central directory and local file header. Also check there is no duplicate entry names that could override the desired content by accident.
>
> Henry Jen has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Address review feedback

src/jdk.jartool/share/man/jar.md line 235:

> 233: 
> 234: The jar tool will return a status code of 0 if there were no integrity issues encountered and a
> 235: status code of 1 an issue was found. When an integrity issue is reported, it will often require

I am wondering if we should not explicitly said status code of 1 to be more flexible.
s/status code of 1/non-zero status code

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PR Review Comment: https://git.openjdk.org/jdk/pull/24430#discussion_r2098459726