RFR: 8352858: Make java.net.JarURLConnection fields final [v2]

[Daniel Fuchs]

On Tue, 25 Mar 2025 09:39:07 GMT, Eirik Bjørsnøs <eirbjo at openjdk.org> wrote:

>> Please help review this cleanup PR which makes the `java.net.JarURLConnection` fields `jarFileURL` and `entryName` final.
>> 
>> The current `parseSpec` method is somewhat crufty, with some code quality  issues which this PR aims to improve:
>> 
>> * The method-level comment seems stale and misplaced
>> * The local variable  `separator` is confusingly incremented during parsing (using pre AND post increment operators) 
>> * Unused local variables introduced for the sole purpose of attaching `@SuppressWarnings` annotations
>> * The `jarFileURL` and `entryName` fields are both assigned more than once
>> * Block comments are used where line comments would suffice
>> 
>> The PR addresses the above issues by inlining `parseSpec` into the constructor, then extracting static helper methods for parsing the file URL and the entry name. This allows the fields to be made final.
>> 
>> Since this is purely a refactoring PR, no tests are updated and the `noreg-cleanup` label is added in JBS.
>> 
>> Reviewing individual commits in this PR may aid verification of separate refactorings.
>
> Eirik Bjørsnøs has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Rename 'separator' to 'separatorIndex', 'nameIdx' to 'nameIndex'

Proposed changes look reasonable. More final is good! 
CI results showed up green.

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Marked as reviewed by dfuchs (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/24218#pullrequestreview-2714989594