import javafx.reflect.*;
import javafx.reflect.FXLocal.*;

public class TestApp {
  public static void main(String args[]) {
    Context context = FXLocal.getContext();
    FXClassType instance = context.findClass("MainStage");
    ObjectValue obj = (ObjectValue)instance.newInstance();

    TestAppInterface ji = (TestAppInterface)obj.asObject();

    ji.showStage();
  }
}