Johan Vos | Lightnews

Johan Vos @johanvos.bsky.social · 2d

It is about identification indeed. All calculations are done based on indexes, so it's the mapping between index-Object that was missing. e.g. instead of

Program p = new Program(2);
new Cnot(0,1);

it now almost support
Qubit ctrl...
Program p = new Program(ctrl, target);
new Cnot(ctrl, target);

Johan Vos @johanvos.bsky.social · 3d

Strange API's need some love. I'm currently working on "named qubits":

Qubit ctrl = new Qubit();
Qubit target = new Qubit();
Program p = new Program(ctrl, target);
p.addSteps(new Step(new Cnot(ctrl, target)));

Easier to work with then referring qubits by index only.

#quantumcomputing #java

Johan Vos @johanvos.bsky.social · 3d

Quantum Computing and AI are completely different things (although there are synergies). The A in AI stands for Artificial. Quantum Computing, otoh, exists because of fundamental phenomena in Nature.

Jeroen Baert @jbaert.bsky.social · 4d

Such a good write-up of making Signal resilient to quantum-based attacks

Why Signal’s post-quantum makeover is an amazing engineering achievement arstechnica.com/security/202...

Why Signal’s post-quantum makeover is an amazing engineering achievement

New design sets a high standard for post-quantum readiness.

arstechnica.com

Johan Vos @johanvos.bsky.social · 6d

Keep in mind that the Gluon LTS releases of JavaFX 17u and JavaFX 21u are free to download and use. We do offer an LTS service (gluonhq.com/lts) but the releases themselves are really free. We don't want to charge people for creating JavaFX applications.
No reason to pay unless you need support.

JavaFX Long Term Support - Gluon

Java FX Long Term Support

gluonhq.com

Johan Vos @johanvos.bsky.social · 6d

Looking for feedback:
The JavaFX Properties/listeners approach if really powerful to bind UI components to changing values.

But it is often over-used and the main source of performance issues. It's very easy to kill performance by adding a listener to a property that is modified during layout.

Johan Vos @johanvos.bsky.social · 12d

JavaFX developers using Windows: please help the development by doing some performance test for Direct3D 12: mail.openjdk.org/pipermail/op...

JavaFX Direct3D 12 - Call for performance testing help

mail.openjdk.org

Johan Vos @johanvos.bsky.social · 14d

The impact of openjdk.org/jeps/510 is huge. Developers using OpenJDK now have many more tools/convenience to work with KDFs. They can more easily take major parts of security/encryption in their own hands, instead of relying on proprietary (cloud-vendor specific) implementations.
#openjdk #java

JEP 510: Key Derivation Function API

openjdk.org

Official account of jfxcentral.com @jfxcentral.com · 19d

Here is the new #JavaFX #LinksOfTheWeek, published on www.jfx-central.com/links.

Thanks to
Paul Krill
Bruce Haddon
@abaddongtz.bsky.social
@frankdelporte.be
@johanvos.bsky.social
@steveonjava.bsky.social
@devoxx.com
Troels Mortensen
@foojay.io

Happy reading, and have a lovely #Java weekend!

Wolfgang Weigend @wolfgangweigend.bsky.social · 20d

A great conversation with Adam Bien at the W-JAX 2025 in Munich about his existing blog posts aligned with LLMs to ask the system about his own achievements for current projects: „What would Adam Bien say?“ @adambien.blog @jaxkonferenz.bsky.social

Devoxx Belgium @devoxx.com · 22d

Part 6 : Java on Mobile - #JavaFX

At #Devoxx Belgium 2025, @frankdelporte.be took the camera and microphone to talk with several speakers and visitors. This time with @johanvos.bsky.social and Stephen Chin...

youtu.be/OrhGyTGJgOg

Java on Mobile - JavaFX

YouTube video by Devoxx

youtu.be

Johan Vos @johanvos.bsky.social · 27d

That doesn't apply to JavaFX. There are many devs, it's used in major corporate projects. But it's not a strategic component for any of the big companies working on openjfx/openjdk, so no devrel, no techvideos, no T&M sales/support... just tons of incoming mail for me.

Johan Vos @johanvos.bsky.social · Oct 26

Thanks! A main problem imho is the split of working on the OpenJFX code versus getting revenues. *Almost* all companies paying devs for working on openjfx do this with indirect revenues, e.g. support contracts. That forces the remaining companies/individuals to do their work for free.

Simon Martinelli @martinelli.ch · Oct 25

The reason for creating tests is not to achieve 80% code coverage, but to gain the assurance that the application will still work after a change.

Johan Vos @johanvos.bsky.social · Oct 25

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

Johan Vos @johanvos.bsky.social · Oct 25

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

Johan Vos @johanvos.bsky.social · Oct 20

For example, I slightly doubt that Google/Facebook is showing all this crap that keeps people scrolling (aka "selling eyeballs") out of good intent.
The days where I thought Google didn't do evil are over.

Johan Vos @johanvos.bsky.social · Oct 20

That's a valid choice.
The consequence though is that I (unpaid for any OpenJFX work) get many angry mails/requests from people who tell me I should do all this work because they rely on it.
The model is completely broken and those who are making money from it aren't interested in fixing it.

Johan Vos @johanvos.bsky.social · Oct 20

I try to do that as much as possible, with people around me. Whether I like them or not.
But no, I don't do that anymore when it involves big tech shareholders and execs.

Johan Vos @johanvos.bsky.social · Oct 20

Great post, thanks for sharing. I agree empathy may help here, but tbh, I believe very often the problem is that some higher-level execs prefer their salary and job title over doing what really should be done.

Johan Vos @johanvos.bsky.social · Oct 17

I thought about this a bit longer. This is not how I believe it should be done. With Gluon, we added a Headless Platform to OpenJFX. There was no (paid!) broad demand for it, but we believe it was the right thing to do.
In my naive opinion, if you think something is needed, you just do it.

Johan Vos @johanvos.bsky.social · Oct 13

Totally agree with this one.

Lars Rosenquist @calvobianco.com · Oct 13

Folks saying: "With a coding assistant I can finally focus and design and specs. This makes me x more productive."

Serious question: How were they not doing that before? They just jumped into IDE without doing any design whatsoever? Whacking code together they gobbled from SO and hope for the best?

Tom Cools @tomcools.be · Oct 13

One of the coolest things about our @bejug.bsky.social community? Everyone can participate and help out. Check out this amazing banner @lomagnette.bsky.social made!

Lars Rosenquist @calvobianco.com · Oct 13

Folks saying: "With a coding assistant I can finally focus and design and specs. This makes me x more productive."

Serious question: How were they not doing that before? They just jumped into IDE without doing any design whatsoever? Whacking code together they gobbled from SO and hope for the best?

Anthony Dahanne @anthony.dahanne.net · Oct 12

What an amazing week! #devoxx Belgium 2025 did not disappoint! So much great content and friendly faces I've finally met IRL!
And wow, they already posted to Youtube all recordings!
You can check out my talk about #paketo #buildpacks youtu.be/RX9zwgHuNmA

Johan Vos @johanvos.bsky.social · Oct 11

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

Official account of jfxcentral.com @jfxcentral.com · Oct 10

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!

Johan Vos @johanvos.bsky.social · Oct 6

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

Johan Vos @johanvos.bsky.social · Oct 3

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

Johan Vos @johanvos.bsky.social · Oct 3

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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