RFR: 8268613: jar --validate should check inital entries of a JAR file [v4]

[Christian Stein]

On Wed, 12 Nov 2025 14:55:02 GMT, Lance Andersen <lancea at openjdk.org> wrote:

>> Christian Stein has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Add comment to test
>
> test/jdk/tools/jar/ValidatorTest.java line 315:
> 
>> 313:     /**
>> 314:      * Validates that the LOC MANIFEST.MF entries are at the expected positions.
>> 315:      *
> 
> Thank you for adding a comment.  I might suggest adding a little more clarity or point to JarInputStream docs as the  Manifest Location for JarFile is not an issue. 
> 
> The issue boils down to the fact that JarInputStream walks the LOC sequentially and because of this there is the limitation on the location of where  the Manifest can live.
> 
> Not a big deal overall and I will leave it to you.  It is just no obvious to someone who is working in this area the 1st time as this issue is not directly related to the Zip specification, but is a JarInputStream limitation

Addressed both, better error messages and the test comment in https://github.com/openjdk/jdk/pull/28154/commits/99e8e3200beac1fea0d32df10d457416773283f3

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PR Review Comment: https://git.openjdk.org/jdk/pull/28154#discussion_r2522351147