Is it possible to create minimal 'software-only' architecture implementation of JavaFX using Java2D/AWT?

[Michael Paus]

Coming back to the original question. CheerpJ has the following 
statement on their roadmap page.


"Thanks to this feature, CheerpJ 4.0 will also introduce initial support 
for /JavaFX, /and will create the foundations to provide full support 
for/SWT /future releases. The support for these toolkits in CheerpJ 
marks a clear intention to allow most UI-based Java Desktop applications 
to run in CheerpJ."

Isn't that exactly what you wanted? The latest version by the way is 
4.2, so this feature should already be available.

Michael

Am 28.01.26 um 23:22 schrieb Jeff Martin:
> JPro definitely seems amazing for deployment - but wouldn’t help with 
> my use case (building/running JavaFX apps client side in the browser).
>
> jeff
>
>
>> On Jan 27, 2026, at 3:16 AM, Dirk Lemmermann <dlemmermann at gmail.com> 
>> wrote:
>>
>> Are you familiar with JPro? It lets you run JavaFX in the browser. We 
>> use it for the jfxcentral website.
>>
>> Dirk Lemmermann
>>
>> CEO Senapt GmbH
>> CEO DLSC Software & Consulting GmbH
>> Zurich, Switzerland
>> +41-(0)79-800-23-20
>> http://www.dlsc.com
>> mailto:dlemmermann at gmail.com
>>
>>
>> Jeff Martin <jeff at reportmill.com> schrieb am Mo. 26. Jan. 2026 um 20:45:
>>
>>     Thanks Kevin! I admit I was mostly asking out of curiosity - I
>>     would love to see more JavaFX in the browser. It looks like the
>>     WebFX project is doing some great things there though. :-)
>>
>>     jeff
>>
>>
>>>     Kevin Rushforth kevin.rushforth at oracle.com <http://oracle.com/>
>>>     Fri Jan 23 21:56:45 UTC 2026
>>>
>>>     No, this isn't possible. Many of the pieces are there to do
>>>     something
>>>     along these lines, but even our software renderer uses native code.
>>>
>>>     A combination of the experimental headless glass toolkit, the
>>>     software
>>>     pipeline, and JFXPanel might get you most of the way there, but
>>>     it would
>>>     take a fair bit of effort to get it to the point where it was
>>>     usable
>>>     without any native code. And if you wanted an ordinary JavaFX
>>>     Application (as opposed to a JFXPanel embedded in a Swing app)
>>>     to run it
>>>     would be even more work.
>>>
>>>     Long ago (before JDK 7) the predecessor to Glass and the Prism
>>>     rendering
>>>     pipeline had an AWT-based implementation of the Windowing
>>>     toolkit and a
>>>     Java2D-based renderer, but those are long gone (except for the
>>>     "j2d"
>>>     renderer, which morphed into a printing pipeline).
>>>
>>>     I doubt this is a direction we would be interested in exploring
>>>     again.
>>>
>>>     -- Kevin
>>>
>>>
>>>>     On Jan 23, 2026, at 1:58 PM, Jeff Martin <jeff at reportmill.com>
>>>>     wrote:
>>>>
>>>>     I wonder, is the architecture independent part of JavaFX
>>>>     written in 100% Java? If so, would it be possible to write a
>>>>     minimal architecture implementation using Java2D/AWT, so many
>>>>     JavaFX apps could run with just the standard JVM?
>>>>
>>>>     I see the repo stats say that ~73% of JavaFX is written in
>>>>     C/C++, and obviously Java2D wouldn’t help with the 3D features
>>>>     or WebView, but a “software only” JavaFX version could be
>>>>     interesting and let many JavaFX apps run in the browser with
>>>>     CheerpJ.
>>>>
>>>>     jeff
>>>>
>>>>     PS - I did ask AI, but it’s unclear to me whether the
>>>>     architecture independent code drops into C before it uses
>>>>     platform dependent code. I’m guessing that it does.
>>>>
>>>>     https://chatgpt.com/share/6973d226-513c-8013-bcc1-0b70ec07a465
>>>>
>>>
>
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