Hi Lingocoder,
I did not find a solution in JPMS. So I abandoned the idea of developing an application in modules. I do not develop a utility or a library so putting the programming module aside is less serious.
At each step of setting up the architecture are hours of research to make the various development tools work together (Eclipse, Gradle, JavaFx, AspectJ etc) while without JPMS just load an Eclipse plugin and it is set.
I understand the usefulness of a modular development but the extra layer on access to the packages, justified as a reinforcement of object concept, had no other effect than to rot my life.
I have tried, but the time I have devoted to this research is a luxury that I can not afford.
Since I have set aside the JPMS development I can devote my time to development and advance my application.
So to conclude the solution was for me to forget the modular development and load a Gradle plugin for JavaFX.