uml relationships in this java code

Question

I would like to hear what all relationships exists here. I assume that here exists relationships like dependency and aggregation with 1-1 multiplicity?

public class Main {

    public Main() {
        Model model = new Model();
        View view = new View();
        Controller controller = new Controller(view, model);
    }

    public static void main(String[] args) {
        new Main();
    }

}

public class Controller {

    private Model model;
    private View view;

    public Controller(Model model, View view) {
       this.model = model;
       this.view = view;
    }

}

public class Model { ... }

public class View { ... }

Answer 1

It's simple, there is no need here for reverse engineering (constructing the model from code).

Main has three associations: one with Model, one with View and one with Controller, while Controller has two associations: one with Model and one with View.

Notice that there is no need for the associations Main-Model and Main-View because they can be derived via main.controller.model and main.controller.view.

The association Main-Controller (as well as Main-Model and Main-View) can be viewed/modeled as a composition, since a main program instance (a process) is composed of a controller instance, which is bundled with a model and a view instance. All three compositions come with a lifecylce dependency: any model, view and controller instance existentially depends on its main aggregate instance.