iiinova — where your digital self keeps evolving

Johan Vos @johanvos.bsky.social · 05/10/2026

Java for data science at #Devoxx. Hands on lab explaining how to use machine learning and scientific projects with #Java

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Johan Vos @johanvos.bsky.social · 17/03/2026

JavaFX 26 SDK's are available, maven artifacts are being published (but it seems to be a busy publishing day ;) )

maven central screenshot, showing openjfx 26 in "publishing" status

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Johan Vos @johanvos.bsky.social · 25/10/2025

Working on OpenJDK for Android: in 43 seconds, I run an app on my phone, make a change in OpenJDK (change dlllookup into dll_lookup), rebuild OpenJDK, link it with my app, push to my phone, run again. OpenJDK development is extremely efficient. #java #innovation #mobile #openjdk

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Johan Vos @johanvos.bsky.social · 25/10/2025

The openjdk-mobile project (github.com/openjdk-mobile) provides daily OpenJDK builds for iOS, packaged as XCFrameworks. Recently, there was a failure because I had to update the bootjdk to 25. Apart from that, very smooth! #java #innovation #openjdk

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Johan Vos @johanvos.bsky.social · 11/10/2025

Devoxx registration: what they promised versus what you got. (but hey, it was a great conference, really enjoyed talking to so many interesting folks!)

ai-generated image of how fancy registration could be

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Johan Vos @johanvos.bsky.social · 09/09/2025

If you're on mac, please try JavaFX 26-ea+6 and share feedback. Tip: add `-Dprism.verbose=true` which will confirm you're really using metal, as shown below. Many thanks to Kevin, Ambarish, Ajit, Jayathirth and others for their great work.

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Johan Vos @johanvos.bsky.social · 14/08/2025

One of my favorite API's for JavaFX testing is Scene.addPostLayoutPulseListener(). I often need to test a condition at the end of a Pulse, and with this API, I can do that. #java #javafx

CountDownLatch cdl = new CountDownLatch(1);
Runnable itemCheck = () -> {
Assertions.assertTrue(charmListView.getItems().contains(newChannel));
cdl.countDown();
};
Platform.runLater(() -> {
charmListView.getScene().addPostLayoutPulseListener(itemCheck);
Platform.requestNextPulse();
});
boolean await = cdl.await(1, TimeUnit.SECONDS);
Assertions.assertTrue(await);

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Johan Vos @johanvos.bsky.social · 02/07/2025

See screenshot below from gluonhq.com/products/jav... We have no devrel/marketing/sales, so I'll say it myself: great job, @gluonhq.com (2/2)

screenshot of possible downloads of JavaFX with a large variety of options.

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Johan Vos @johanvos.bsky.social · 05/06/2025

Headless JavaFX platform passes almost all tests, with remaining failures being understood. Time to bring this to the next step: mail.openjdk.org/pipermail/op...

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Johan Vos @johanvos.bsky.social · 28/05/2025

I know that I have ambitious goals in JDK space: OpenJDK/Mobile +tooling, synced OpenJFX building with OpenJDK , and a Headless platform for OpenJFX. Progress on the latter: 88% of the tests pass.

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Johan Vos @johanvos.bsky.social · 10/05/2025

One of my favorite t-shirts. But also a broken promise by a large company. I keep believing it's not too late though. Technically, we already have Java running on iOS. But we need more support, technical and marketing. And courage.

javaone t-shirt with mobile devices and Oracle on it

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Johan Vos @johanvos.bsky.social · 04/05/2025

Still working on major performance improvements in Strange (QC in Java, github.com/redfx-quantu...). 274/286 tests are passing, but I can only merge once I am at 100%. I'm glad I wrote many tests when starting this. Need to detect all possible edge cases.

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Johan Vos @johanvos.bsky.social · 02/04/2025

While on it, I added basic support for macos builds of OpenJDK including OpenJFX (missing javafx.media and javafx.web). All code changes are in github.com/johanvos/jdk...

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Johan Vos @johanvos.bsky.social · 21/03/2025

Progress with combined OpenJDK/OpenJFX repo (my OpenJDK fork that contains all my changes is at github.com/johanvos/jdk...). I did a cross-compiled build for Linux-aarch64. Here is a JavaFX app running on the Pi: #java #javafx

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Johan Vos @johanvos.bsky.social · 12/03/2025

A small, boring screenshot, but imho an important step. I cross compiled the latest openjdk/jdk with javafx base/graphics/controls mods on Linux x86-64 to Linux aarch64 and ran it on a raspberry pi. #java #javafx

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Johan Vos @johanvos.bsky.social · 28/02/2025

Prima opinie stuk in @de-standaard.bsky.social maar aub, stop nu toch eens met mensen aan te moedigen om dingen te delen op Facebook/X. Je voedt het algoritme dat dingen mogelijk maakt die in dit stuk net aangeklaagd worden. Extreme content -> meer clicks -> meer ad revenues.

article about the problems with the power of Facebook, with a link to how to share it on facebook.

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Johan Vos @johanvos.bsky.social · 18/02/2025

Een aanrader: van dezelfde auteur, en met veel prentjes :)

foto van het boek "Monsterlijke microben" van Marc Van Ranst en Geert Bouckaert

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Johan Vos @johanvos.bsky.social · 11/01/2025

I still see them (until december, but they are always a few weeks behind)?

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Johan Vos @johanvos.bsky.social · 03/01/2025

I wanted to check how good ChatGPT is at some basic quantum computing questions. Let's start with simple math. If n = 2, the number of qubits required for Shor's algorithm is 2n+3. After wrong steps, ChatGPT gives the correct answer. Because, 2 + 6 + 1 =... 🤔🤣

chatgpt output stating that 2 + 6 + 1 = 7

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Johan Vos @johanvos.bsky.social · 21/12/2024

I'm working on StrangeFX, and looking for input from JavaFX developers. What would be your preferred root layout container for this concept? StrangeFX currently use a Group for this, but I am thinking about changing this, to improve embedding capabilities in e.g. JTaccuino.

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Johan Vos @johanvos.bsky.social · 13/12/2024

Today, Manning has 50% off all eBooks, including my book on Quantum Computing with Java: www.manning.com/books/quantu...

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Johan Vos @johanvos.bsky.social · 13/12/2024

There's an interesting issue with the URL in your post. It wasn't clickable, and copy-paste it and retrieve with curl failed: curl: (3) URL using bad/illegal format or missing URL Manually typing the URL did work. So I checked the bytes, and it starts with {-30, -128, -86} which is U+202A (LTR)

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Johan Vos @johanvos.bsky.social · 10/12/2024

(probably unimpressive for most) Progress. This is from the XCode console, output from an iPhone. HelloWorld.java on iOS using hotspot (zero interpreter mode). Finally back to the point reached by the great Bob Vandette many years ago. Need to anchor this.

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Johan Vos @johanvos.bsky.social · 09/12/2024

Time flies. This is my typical reminder that another 6 months have passed. Need to update the build JDK for building OpenJDK.

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Johan Vos @johanvos.bsky.social · 29/11/2024

VisualVM (visualvm.github.io) can be a great help in performance tuning for JavaFX apps. Screenshot below shows the single-threaded JavaFX AppThread spends ca 2/3 of its time in "userspace" (Platform.runLater) and about 30% time in rendering (QuantumToolkit$$...).

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Johan Vos @johanvos.bsky.social · 25/11/2024

Not impressive to most, but I'm happy! Porting latest hotspot to iOS, I am back to the path Bob Vandette followed years ago, using the Zero interpreter. Current status is a Java stacktrace, which is great as that means the classloading and interpreter loop are working, including native code! Pfew.

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Johan Vos @johanvos.bsky.social · 06/11/2024

I can't vote for everything, but at least I can vote for the future of Java.

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Johan Vos @johanvos.bsky.social · 03/10/2023

On Thursday, I'll try to explain to Java developers at @devoxx why Quantum Computing is relevant and how they can leverage it. Join me here: devoxx.be/talk/?id=39135

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