JavaFX on webtechie.be

Closing the Visual Gap Between the Official Lottie Webplayer and Lottie4J

Thu, 02 Jul 2026 00:00:00 +0000

A Lottie library is only as good as its output looks. If an animation renders differently in Lottie4J than it does in the official web player, that’s a bug, even when no exception is thrown and the code looks correct.

JavaFX Links of June 2026

Fri, 26 Jun 2026 00:00:00 +0000

Here are the JavaFX LinksOfTheMonth of June 2026. You can find the weekly lists on jfx-central.com . Did we miss anything? Is there anything you want to have included in one of the next overviews? Let us know via links@jfx-central.com .

JavaFX In Action #27 with David Gutierrez about JMathAnim to Create Mathematical Animations

Thu, 25 Jun 2026 00:00:00 +0000

The JFX Central Links Of The Week is a great source to discover what is happening in the JavaFX world. One of the projects that caught my eye is JMathAnim, a tool to create mathematical animations built on top of JavaFX. In this interview, David Gutierrez, a mathematician from Spain, walks us through what the project can do and how it came to life.

Lottie4J Meets LottieFiles: A Conversation with Naail Abdul Rahman

Thu, 04 Jun 2026 00:00:00 +0000

Lottie animations run on Android, iOS, and the web. Getting them working on the JVM is a different story. Lottie4J started as a question: can JavaFX render them without a WebView? That question turned into a library with a first release in March 2026! Since then, I received the first pull requests, recently added headless unit testing with JavaFX 26, and now this: a video conversation with Naail from the LottieFiles team.

JavaFX Links of May 2026

Fri, 29 May 2026 00:00:00 +0000

Here are the JavaFX LinksOfTheMonth of May 2026. You can find the weekly lists on jfx-central.com . Did we miss anything? Is there anything you want to have included in one of the next overviews? Let us know via links@jfx-central.com .

JavaFX Links of April 2026

Fri, 24 Apr 2026 00:00:00 +0000

Here are the JavaFX LinksOfTheMonth of April 2026. You can find the weekly lists on jfx-central.com . Did we miss anything? Is there anything you want to have included in one of the next overviews? Let us know via links@jfx-central.com .

Debugging BentoFX in MelodyMatrix with Matt Coley, Scenic View, and an Honest Look at AI-Generated Code

Tue, 21 Apr 2026 00:00:00 +0000

There are bugs you can solve by yourself, and bugs where you just need to sit down with someone who knows the internals. This video is in the second category. MelodyMatrix uses BentoFX for its dockable panel layout. Branches, leaves, tabs on the side, content panels that open and close. It works well until something fights the layout. But I had some visual problems I could not explain, some code that felt more complicated than it should be, and no good explanation for why.

Testing Lottie4J JavaFX Animations in GitHub Actions Without a Display: JavaFX 26 Headless to the Rescue

Mon, 20 Apr 2026 00:00:00 +0000

When I released Lottie4J 1.1.0 , I mentioned something a bit embarrassing in the release notes and this blog post : there was a new unit test to compare the JavaFX player output against a JavaScript reference player, but it “can not run on CI, because it requires a display output.” A TODO. A known limitation. One of those notes you write hoping future-you will figure it out.

MelodyMatrix V1.0.0 Released: Shipping a JavaFX App with jDeploy, GitHub Actions, and Auto-Update

Thu, 16 Apr 2026 00:00:00 +0000

Some side projects take a while to get to a proper release. MelodyMatrix is one of those. The app has been downloadable for quite some time thanks to jDeploy , but there was no official V1.0.0 yet. No tagged release. No moment of “okay, this is it.” Just a rolling build on every commit to the main branch.

JavaFX Links of March 2026

Fri, 27 Mar 2026 00:00:00 +0000

Here are the JavaFX LinksOfTheMonth of March 2026. You can find the weekly lists on jfx-central.com . Did we miss anything? Is there anything you want to have included in one of the next overviews? Let us know via links@jfx-central.com .

Lottie4J 1.2.0: dotLottie Support, Marker Playback, Cropping, and a Big Speed Boost

Fri, 20 Mar 2026 00:00:00 +0000

Version 1.2.0 of Lottie4J is out, and it’s again a big release! The headline feature is support for the .lottie container format, but that’s just the start. This release also brings marker-based playback, cropping, adaptive rendering, significant performance improvements, and a lot of core model fixes driven by testing more complex real-world animations.

Lottie4J 1.1.0: Better Rendering, Smarter Debugging, and an animated Lottie4J Logo!

Tue, 10 Mar 2026 00:00:00 +0000

Just one week after the first public release of Lottie4J , the open-source Java library for rendering Lottie animations in JavaFX, version 1.1.0 is already out. And it’s a big one!

Introducing Lottie4J, a Java(FX) Library to Parse and Play Lottie Animation Files

Mon, 02 Mar 2026 00:00:00 +0000

I’m proud to present a new JavaFX library: Lottie4J, that brings Lottie animations to JavaFX applications. I first learned about Lottie many years ago when we were developing a mobile app. We used Lottie animations to explain to users how to operate a physical device. The animations made the instructions so much clearer than static images or text alone.

JavaFX Links of February 2026

Thu, 26 Feb 2026 00:00:00 +0000

Here are the JavaFX LinksOfTheMonth of February 2026. You can find the weekly lists on jfx-central.com . Did we miss anything? Is there anything you want to have included in one of the next overviews? Let us know via links@jfx-central.com .

JavaFX In Action #26 with Helal Anwar about GradedAttendance to Organize Class Rooms, Students, Teachers, and Lessons

Thu, 19 Feb 2026 00:00:00 +0000

Every week I collect a list of posts, social messages, videos, etc. related to JavaFX on the JFX Central Links Of The Week . One of the regular “appearances” is Helal Anwar, who is building impressive educational tools with JavaFX. In this interview, we discuss his GradedAttendance application and other JavaFX projects he’s working on.

JavaFX In Action #25 with Lidiany Cerqueira about CERCA, a tool to detect hallucinated references in scientific papers

Thu, 05 Feb 2026 00:00:00 +0000

Every week I collect a list of posts, social messages, videos, etc. related to JavaFX on the JFX Central Links Of The Week . That’s how I recently found a message from Lidiany Cerqueira on LinkedIn about CERCA . It’s a tool she created during her Christmas break to detect false/hallucinated references in scientific manuscripts.

JavaFX Links of January 2026

Fri, 30 Jan 2026 00:00:00 +0000

Here are the JavaFX LinksOfTheMonth of January 2026. You can find the weekly lists on jfx-central.com . Did we miss anything? Is there anything you want to have included in one of the next overviews? Let us know via links@jfx-central.com .

JavaFX Links of December 2025

Fri, 19 Dec 2025 00:00:00 +0000

Here is the final JavaFX LinksOfTheMonth for 2025… Thank you all for sharing your knowledge and experience with JavaFX. And we hope to see even more in the next year!

JavaFX In Action #24 with Florian Enner about Robot 3D Visualizations and Charts

Thu, 04 Dec 2025 00:00:00 +0000

I met Florian Enner a few times at Devoxx in Belgium, and each time he amazed me with his JavaFX demos! He is one of those rare developers who take JavaFX to the next level by adding 3D visualizations.

JavaFX Links of November 2025

Fri, 28 Nov 2025 00:00:00 +0000

Here is the overview of the JavaFX LinksOfTheMonth of November 2025. You can find the weekly lists on jfx-central.com . Did we miss anything? Is there anything you want to have included in one of the next overviews? Let us know via links@jfx-central.com .