The very first examples (yes, Hello World) will Not Even compile. And that's not just an environment problem: the code is really broken, referring to JavaFX packages That simply do not exist (eg "javafx.builders", please email me if you find That in JavaFX API). For a non-free programming learning resource, that 'is unacceptable.
Wow. Congratulations, guys. And to say I paid for this ...
