On Thu, 9 Apr 2026 05:19:41 GMT, Eirik Bjørsnøs <[email protected]> wrote:

> This PR reorganizes `java.util.zip.ZipCoder` class hierarchies to handle 
> UTF-8 in the base class and move support for general charsets down to a 
> subclass. This better reflects reality where most ZIP files are encoded using 
> UTF-8. 
> 
> The motivation can be summarized as:
> 
> * Supporting the common case in the base class and the exceptional case in a 
> subclass seems more natural and intuitive for maintainers
> * We avoid loading both classes for most JVM instances
> * A small performance improvement is observed, probably caused by unlocking 
> effecively-monomorphic JVM optimizations
> 
> See core-libs-dev discussion for details: 
> https://mail.openjdk.org/pipermail/core-libs-dev/2026-January/158281.html
> 
> I have tried to not move methods around too much,  making the side-by-side 
> diff when ignoring whitespace easier to review. We can discuss further 
> cleanups and reorganizaton if so desired. 
> 
> It may be useful to review commits individually. The first commit fe4a627 
> moves some methods out the way for the second commit 2926398. 
> 
> This PR also includes the similar change to the `ZipFileSystem` 
> implementation of ZipCoder to keep these aligned. Could be pulled out to a 
> separate PR if reviewers want to focus on a single area per PR.
> 
> - [x] I confirm that I make this contribution in accordance with the [OpenJDK 
> Interim AI Policy](https://openjdk.org/legal/ai).

This pull request has been closed without being integrated.

-------------

PR: https://git.openjdk.org/jdk/pull/30640

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