RFR: 8345431: Detect duplicate entries in jar files with jar --validate [v6]

[Lance Andersen]

On Wed, 14 May 2025 16:39:54 GMT, Henry Jen <henryjen at openjdk.org> wrote:

> UTF-8 messed up the index, we don't want any conversion to happen. Warning: Entry META-INFMAANIFEST.MF in local file header is not in central directory Warning: Entry META-INF/BANIFEST.MF in local file header is not in central directory Warning: Entry METAMINF/AANIFEST.MF in central directory is not in local file header Warning: Entry METAMINF/BANIFEST.MF in central directory is not in local file header

Without looking into this in finer detail I am not sure what the issue is and is why the other tests typically use the actual offset to modify.

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PR Review Comment: https://git.openjdk.org/jdk/pull/24430#discussion_r2089413418