A DESCRIPTION OF THE PROBLEM :
An undecorated JavaFX Stage does not display the Windows animations when it is minimized / maximized, resulting in unprofessional result of window just appearing and disappearing.

In addition, clicking on the taskbar item of an undecorated JavaFX Application does not minimize / restore the application without JNA hackery. For more details, see:

https://stackoverflow.com/questions/51008461/javafx-minimizing-maximing-undecorated-stage-with-animations