After years of experimenting with Raspberry Pi boards, Java, JavaFX, and Pi4J to control electronics, I wanted to explore whether my knowledge and experience could be applied to similar boards from other providers. There are many alternatives available these days, based on ARM, Intel processors, and RISC-V architectures.

I don’t have any bitcoin myself, but still find the idea of the blockchain and “public shared money” fascinating. And as it turns out, there is a free and open-source bitcoin wallet, created with JavaFX, that wants to help people understand how the Bitcoin system works, and make transactions easy to understand. Thanks to the work of Craig Raw, there is an easy-to-use desktop application to create and manage wallets. And while he explains the app itself, we also learn a lot about the Bitcoin ecosystem, reproducible builds, security, hardware wallets, and more!

These are the links from the JFall talk in Ede, The Netherlands, on November 6, 2025: “The Wait is Over: Foreign Function & Memory (FFM) API brings modern Java to the Raspberry Pi”.

While looking for articles for the JFX Central Links Of The Week, I found this very interesting article by Paul Krill on InfoWorld. It’s based on an October 29 post by Bruce Haddon on an OpenJDK discussion list in which he argues that the reasons for the separation of OpenJFX from OpenJDK in Java 11, more than seven years ago, are much less applicable today.

Here is the overview of the JavaFX LinksOfTheMonth of October 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.

For my next JavaFX In Action interview, I talked with Matt Coley about Recaf and the JavaFX libraries he’s working on. But unexpectedly, I got a deep-dive course on Java byte code, obfuscated code, and how JARs can be (ab)used to hide the real code they are executing…!

Vlad Protsenko is a Clojure developer working at Defold. While I initially wanted to learn about the Cljfx project, our conversation evolved into a learning experience: a practical getting-started guide to Clojure, a hands-on demonstration of building JavaFX user interfaces with minimal code, and an inside look at the Defold game engine and its JavaFX-based IDE.

As described before on Java 21+ Not Working on Raspberry Pi Zero 2, a problem appeared to execute Java code on the Raspberry Pi Zero 2 with OpenJDK 21 or higher. Reason: in OpenJDK 21 the Just-In-Time (JIT) compiler has been improved, but this change doesn’t work correctly on the ARM Cortex-A53 processor as used in the Zero 2. It’s another type of processor compared to, for instance, the Raspberry Pi 4 (Cortex-A72) and 5 (Cortex-A76).

These are the links from the Devoxx talk in Antwerp, Belgium, on October 9, 2025: “The Wait is Over: Foreign Function & Memory (FFM) API brings modern Java to the Raspberry Pi”.

2025 is an important year as Java 25 got released, a version which will be supported for many more years. On top of that, the Pi4J library will soon be published as V4.0.0 with a new plugin making use of the FFM API, a new feature added to Java in version 22.