How can i use Guice in JavaFX controllers?

Question

I have a JavaFX application where I would like to introduce Guice because my Code is full of factorys right now, only for the purpose of testing.

I have one use case

Answer 1

I don't use Guice, but the simplest approach would appear to be just to use a controller factory on the FXMLLoader. You can create a controller factory that instructs the FXMLLoader to use Guice to initialize your controllers:

final Injector injector = Guice.createInjector(...);
FXMLLoader loader = new FXMLLoader(getClass().getResource(...));
loader.setControllerFactory(new Callback, Object>() {
   @Override
   public Object call(Class type) {
       return injector.getInstance(type);
   }
});
// In Java 8, replace the above with 
// loader.setControllerFactory(injector::getInstance);
Parent root = loader.load();