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Johan Vos

@johanvos.bsky.social

820 followers 69 following 240 posts

Java Champion, Gluon and LodgON. co-lead OpenJFX, lead OpenJDK-Mobile . Java for science, Quantum Computing. PhD

Videos

History 28%

Philosophy 25%

Posts Media Videos Starter Packs

Johan Vos @johanvos.bsky.social · 16h

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

Reposted by Johan Vos

Official account of jfxcentral.com @jfxcentral.com · 1d

New #JavaFX #LinksOfTheWeek, published on www.jfx-central.com/links.

Thanks to
@johanvos.bsky.social
@trixon.se
@crschnick.bsky.social
@sunnykentz.bsky.social
@sreimers.bsky.social
Michael Hoffer
Florian Enner
Abid Maqbool
Haidar Ali
@dlemmermann.bsky.social

Have a lovely weekend!

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Johan Vos @johanvos.bsky.social · 5d

Now at #devoxx: @sreimers.bsky.social talking about jtaccuino. #java #javafx

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Johan Vos @johanvos.bsky.social · 8d

Next step is the integration of Leyden code into OpenJDK/mobile. Hope to get support from the Leyden experts. (2/2)
#java #javafx #openjdk

GitHub - openjdk-mobile/openjfx-build: Building OpenJFX using OpenJDK

Building OpenJFX using OpenJDK. Contribute to openjdk-mobile/openjfx-build development by creating an account on GitHub.

github.com

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Johan Vos @johanvos.bsky.social · 8d

I can now run HelloFX on an iPhone. This required only really minor changes to OpenJFX and OpenJDK, and I'll update github.com/openjdk-mobi... as soon as I find some time. Most of the work (> 99%) went into understanding the tons of options in XCode.
(1/2)

GitHub - openjdk-mobile/openjfx-build: Building OpenJFX using OpenJDK

Building OpenJFX using OpenJDK. Contribute to openjdk-mobile/openjfx-build development by creating an account on GitHub.

github.com

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Reposted by Johan Vos

Devoxx Belgium @devoxx.com · 8d

Safe travels to all Devoxxians heading to Antwerp!
See you soon at #Devoxx 🚆✈️🚗🚴🏼

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Reposted by Johan Vos

Signal @signal.org · 9d

In 2023, Signal was the first mainstream messenger to enable post-quantum cryptography. We’re still ahead of the (elliptical) curve, implementing a new hybrid PQ ratchet ensuring Forward Secrecy & Post-Compromise Security even in a post-quantum world. signal.org/blog/spqr/

Signal Protocol and Post-Quantum Ratchets

We are excited to announce a significant advancement in the security of the Signal Protocol: the introduction of the Sparse Post Quantum Ratchet (SPQR). This new ratchet enhances the Signal Protocol’s...

signal.org

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Reposted by Johan Vos

Devoxx Belgium @devoxx.com · 10d

The final #Devoxx Belgium 2025 newsletter is out! 🚀
First-time Devoxxians, this one’s especially for you, don’t miss it!
redirect.devoxx.be/nl3/w2QUJQCh...

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Johan Vos @johanvos.bsky.social · 11d

Looking forward to #Devoxx Belgium next week. Excellent speakers/sessions, and great atmosphere.
I'm more than happy to do interviews about Java/JavaFX on Mobile and explain github.com/openjdk-mobile so ping me if interested. (also happy to chat about quantum computing, javafx, science, cycling...)

openjdk-mobile

openjdk-mobile has 3 repositories available. Follow their code on GitHub.

github.com

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Johan Vos @johanvos.bsky.social · 16d

Progress in the OpenJDK-mobile story.
Repository created that has actions to build openjdk+openjfx from head of both upstream repos. github.com/openjdk-mobi...
I needed this for desktop, and it makes mobile easier.
Linux-build that runs HelloFX (without setting modulepath etc) is now working.

GitHub - openjdk-mobile/openjfx-build: Building OpenJFX using OpenJDK

Building OpenJFX using OpenJDK. Contribute to openjdk-mobile/openjfx-build development by creating an account on GitHub.

github.com

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Johan Vos @johanvos.bsky.social · 16d

Not going to let this happen. #resist

Jeroen Baert @jbaert.bsky.social · 16d

Belgium wants something impossible for #chatcontrol: only look at the messages where it's needed, thus safeguarding E2EE somehow, by magic. WHICH MEANS LOOKING INTO ALL MESSAGES AND BREAKING E2EE.

Reposted by Johan Vos

Jeroen Baert @jbaert.bsky.social · 16d

Belgium wants something impossible for #chatcontrol: only look at the messages where it's needed, thus safeguarding E2EE somehow, by magic. WHICH MEANS LOOKING INTO ALL MESSAGES AND BREAKING E2EE.

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Reposted by Johan Vos

Devoxx Belgium @devoxx.com · 18d

Clickable link m.devoxx.com/events/dvbe25

Devoxx Belgium 2025

Your ultimate companion for Devoxx conferences worldwide. Browse talks, speakers, schedules, and manage your personalized conference experience.

m.devoxx.com

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Johan Vos @johanvos.bsky.social · 22d

I agree, but that is performance gained because of a framework.
I am pretty sure many apps out there have app-specific business logic (independent of frameworks) that could be implemented much better (hence less cloud costs).

Johan Vos @johanvos.bsky.social · 22d

Correct me when I'm wrong on this, but I have the impression that over the past decade there is a decreasing attention for performance when developing Java "cloud" apps, and more attention for cloud tools that solve performance by "scaling in any direction you want" (resulting in higher cloud bill).

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Reposted by Johan Vos

Mark Reinhold @mreinhold.org · 25d

Java 25 / JDK 25: General Availability: mail.openjdk.org/pipermail/jd...

Features: openjdk.org/projects/jdk...

Downloads: jdk.java.net/25/

#Java25 #JDK25 #OpenJDK #Java

Java 25 / JDK 25: General Availability

mail.openjdk.org

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Reposted by Johan Vos

Gluon @gluonhq.com · 25d

JavaFX 25 is available! Released the same day as Java 25.
Get the SDK from gluonhq.com/products/jav... or download the maven artifacts from maven central.

JavaFX - Gluon

Roadmap Release GA Date Latest version Minimum JDK Long Term Support Extended or custom support Details 26 March 2026 early access 23 no 25 September 2025 25 (September 2025) 23 yes upon request detai...

gluonhq.com

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Johan Vos @johanvos.bsky.social · 25d

We *very much* depend on, and leverage the great technical work, including the open discussions in OpenJDK mailing lists, github PR's and JBS issues. Important to make the distinction between the top-quality work from engineers and the strategic decisions made by companies.

Johan Vos @johanvos.bsky.social · 25d

To be very clear on the broader OpenJDK-mobile initiative we accounced last month with @gluonhq.com (openjdk-mobile.github.io) : this is all based on open-source tech (github.com/openjdk/mobile). We deliberately avoided dependencies on company-owned products. #techfirst

Java on Mobile

openjdk-mobile.github.io

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Johan Vos @johanvos.bsky.social · 26d

really cool, thanks!
Any feedback/remarks/questions, let me know :)

Reposted by Johan Vos

Hallvard Trætteberg @hallvard.bsky.social · 28d

In our local JUG, javabin Trondheim, we’re celebrating Java 25 on Monday. In addition, I’m presenting about QC and @johanvos.bsky.social’ Strange simulator! I’m not through the whole book, yet, but I’m already totally fascinated!

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Johan Vos @johanvos.bsky.social · Sep 11

Let us know :)

Johan Vos @johanvos.bsky.social · Sep 9

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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Reposted by Johan Vos

De Standaard @standaard.be · Sep 9

Column Hendrik Vos | "Het is van levensbelang om scherp te blijven en nooit ruim baan te geven aan ijdeltuiten die zich onaantastbaar wanen, verheven boven de wetten van het ondermaanse – of ze nu resideren in het Witte Huis, het Kremlin of het ‘Cremlin’ (het gemeentehuis van Aalter)"

www.standaard.be

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Johan Vos @johanvos.bsky.social · Sep 5

I'm doing similar experiments for Strange. Trying to figure out the most performant approach for doing matrix multiplications with complex numbers in (future) Java.

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Johan Vos @johanvos.bsky.social · Sep 4

There are so many cool performance tricks for JavaFX that I sometimes think I should write a book about it. But that takes a huge amount of time. I'll think a bit more about how to deal with this.
#java #javafx

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Johan Vos @johanvos.bsky.social · Sep 2

Terechte opmerking. Er is m.i. ook een grote grijze zone, met veel variaties. Maar de applications waarbij het business model draait op verslaving, polarisatie en surveillance worden volgens mij best massaal gemeden.

Reposted by Johan Vos

Gluon @gluonhq.com · Sep 2

Blog post about our OpenJDK mobile initiative: gluonhq.com/bringing-ope...

Bringing OpenJDK to Mobile: A Community Effort - Gluon

When we started Gluon nearly a decade ago, one of our key goals was to make Java a first-class citizen on mobile. We built a toolchain that allowed developers to run Java and JavaFX applications on iO...

gluonhq.com

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Johan Vos @johanvos.bsky.social · Sep 2

Het wordt stilaan tijd voor een #deletefacebook moment, maar dan breder dan enkel facebook (Ik deed dit in 2023: johanvos.wordpress.com/2023/12/07/w...)

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Johan Vos @johanvos.bsky.social · Aug 29

A new chapter for Java on Mobile.

Gluon @gluonhq.com · Aug 29

Announcing openjdk-mobile.github.io

An initiative to collaborate on tools/expertise for real Java on Mobile

mail.openjdk.org/pipermail/mo...

Let's leverage the power, beauty and maintainability of OpenJDK to run Java apps on mobile!

Java on Mobile

openjdk-mobile.github.io

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