Pi4J V.2 is a complete re-write and does not maintain API compatibility with previous versions. It is not intended to be a drop-in replacement for previous versions of Pi4J. Pi4J V.2 is a completely new design bringing modern conventions, development practices, extensibility support and simplified integration experience for Pi4J users.
This website aims to be the source of documentation for all things Java on Raspberry Pi. As such, you will not only find info on Pi4J, but also getting started examples for basic Java Pi4J projects, JavaFX user interface applications, FXGL games, etc.
This is a true open-source project, meaning it can only evolve, grow and improve by the support of the community. Any idea, documentation improvement, bug fix... is greatly welcomed through the normal GitHub flow!