JEP proposed to target JDK 26: 500: Prepare to Make Final Mean Final

Mark Reinhold mark.reinhold at oracle.com
Thu Nov 6 22:19:27 UTC 2025


2025/10/30 14:35:45 -0400, Mark Reinhold:
> The following JEP is proposed to target JDK 26:
>
>   500: Prepare to Make Final Mean Final
>    https://openjdk.org/jeps/500
>
>   Summary: Issue warnings about uses of deep reflection to mutate
>   final fields.  These warnings aim to prepare developers for a future
>   release that ensures integrity by default by restricting final field
>   mutation, which will make Java programs safer and potentially faster.
>   Application developers can avoid both current warnings and future
>   restrictions by selectively enabling the ability to mutate final fields
>   where essential.
>
> Feedback on this proposal from JDK Project Committers and Reviewers [1]
> is more than welcome, as are reasoned objections.  If no such objections
> are raised by 20:00 UTC on Thursday, 6 November, or if they’re raised
> and then satisfactorily answered, then per the JEP 2.0 process proposal
> [2] I’ll target this JEP to JDK 26.

Hearing no objections, I’ve targeted this JEP to JDK 26.

- Mark



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