RFR: 8317678: Fix up hashCode() for ZipFile.Source.Key [v2]

[Sean Coffey]

On Tue, 10 Oct 2023 12:46:22 GMT, Sean Coffey <coffeys at openjdk.org> wrote:

>> Fix up java.util.zip.ZipFile$Source hashCode() impl so that duplicate Source objects aren't created for the same zip file.
>
> Sean Coffey has updated the pull request incrementally with one additional commit since the last revision:
> 
>   incorporate review comments

Thanks for the comments to date. I think the latest commit should satisfy requests made.

for `Key.equals(Object)` and `Key.hashCode()` - I've changed the impl so that attrs.lastModifiedTime() is only used in the case where `attrs.fileKey()` returns null. Is that in the direction you were suggesting Alan ?

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PR Comment: https://git.openjdk.org/jdk/pull/16115#issuecomment-1755350508