Proposal: Bump minimum JDK for JavaFX 25 to JDK 23 (more generally, set min for JavaFX N to JDK N-2)

[Nir Lisker]

Sounds good.

Java 23 contains mostly preview features, but brings Markdown docs.

https://javaalmanac.io/jdk/23/

On Tue, Jun 17, 2025, 18:46 Kevin Rushforth <kevin.rushforth at oracle.com>
wrote:

> All,
>
> Even though we build JavaFX 25 binaries with JDK 23 (which is being
> updated to JDK 24 this week), as the boot JDK, the latest version of
> JavaFX still runs with JDK 22, although it isn't tested with older JDK
> versions.
>
> In order for JavaFX to be able to use more recent JDK features, we
> should increase the minimum version of the JDK that can run the latest
> JavaFX. Additionally, there is an ongoing cost to keeping JavaFX
> buildable and runnable on older versions of Java, and little reason to
> continue to do so.
>
> I propose to bump the minimum version of the JDK needed to run JavaFX 25
> to JDK 23. I further propose to adopt a standard practice of setting the
> minimum JDK for JavaFX N to JDK N-2. JavaFX N is primarily intended for
> use with JDK N; we also build and test it against JDK N-1 (which is
> typically what we use as the boot JDK). Anything older than that,
> including the proposed minimum JDK N-2 (23 in this specific case), is
> untested.
>
> I filed JDK-8359387 [1] to track this and prepared PR #1827 [2]. This
> will *not* affect update releases of earlier versions of JavaFX (e.g.,
> JavaFX 24.0.NN or JavaFX 21.0.NN), which will continue to run with the
> same minimum JDK that they run on today.
>
> Note: in keeping with the "tip and tail" model [3], developers who want
> to run their application on an LTS of the JDK should also get a
> corresponding LTS of JavaFX.
>
> Comments are welcome.
>
> -- Kevin
>
> [1] https://bugs.openjdk.org/browse/JDK-8359387
> [2] https://github.com/openjdk/jfx/pull/1827
> [3] https://openjdk.org/jeps/14
>
>
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