V4 of Pi4J has arrived! Based on Java 25 with a new plugin using the Foreign Function and Memory API. This will allow us to bring Java for GPIO interaction to many more boards!

All the info in the release notes:
https://www.pi4j.com/about/release-notes/

Interview with Nick Gritsenko, creator of the new plugin:
https://www.pi4j.com/blog/2026/2026-interview-nick-ffm/

Release Notes - Pi4J

Java IO Library for the Raspberry Pi