RFR: 8345431: Improve jar --validate to detect duplicate or invalid entries [v12]

[Jaikiran Pai]

On Thu, 22 May 2025 01:29:12 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:
> 
>   Validator to take a file, use term JAR file

test/jdk/tools/jar/ValidatorTest.java line 60:

> 58: import jdk.test.lib.util.FileUtils;
> 59: 
> 60: @TestInstance(Lifecycle.PER_CLASS)

I haven't seen this used commonly in our tests. Is there something specific in this test that requires this usage?

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PR Review Comment: https://git.openjdk.org/jdk/pull/24430#discussion_r2102353416