RFR: 8376403: Avoid loading ArrayDeque in java.util.zip.ZipFile [v3]

[Eirik Bjørsnøs]

On Tue, 27 Jan 2026 09:30:19 GMT, Eirik Bjørsnøs <eirbjo at openjdk.org> wrote:

>> Hot on the heals of #29288, this PR replaces `ArrayDeque` with `ArrayList` for the Inflater cache implementation in `ZipFile.CleanableResource`.
>> 
>> With this PR, we change the order of the cache from a LIFO queue to a FIFO stack backed by ArrayList. The order seems unimportant, and has indeed been FIFO in the past when using `java.util.Vector`. Intuitively, it should be better to return the most recently used Inflater.
>> 
>> No tests updated, strict refactoring, `noreg-cleanup`.
>
> Eirik Bjørsnøs has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Remove null check of final field istreams which is never null

src/java.base/share/classes/java/util/zip/ZipFile.java line 764:

> 762: 
> 763:             // Close streams, release their inflaters
> 764:             if (istreams != null) {

Small additional fix to remove unnecessary null check of the final, definitely assigned  field `istreams`.

Unrelated to issue at hand, included here since it is close code and to avoid the PR churn for such a trivial cleanup if fixed separately.

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PR Review Comment: https://git.openjdk.org/jdk/pull/29430#discussion_r2731082663