RFR: 8322802: Add testing for ZipFile.getEntry respecting the 'Language encoding' flag [v3]

[Eirik Bjørsnøs]

On Tue, 2 Jan 2024 08:02:46 GMT, Jaikiran Pai <jpai at openjdk.org> wrote:

> The change to allow user/application specific arbritary charsets to the `ZipFile` constructor seems to have been done long back in Java 1.7 days as part of https://bugs.openjdk.org/browse/JDK-4244499.
> 
> This is merely an observation and I don't expect any changes to the ZipFile source or any of your proposed tests, in this context.

I agree that changing this long-standing behavior now is probably not worth the risk. Also, there are probably non-compliant ZIPs out there worth opening.

We could perhaps consider adding a note to the documentation of `ZipFile(File, Charset)` mentioning that the only fully standards-compliant charset is 'IBM Code Page 437'. However, I think that's out of scope for this PR.

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PR Comment: https://git.openjdk.org/jdk/pull/17207#issuecomment-1873790654