MVC: Pass data from view to controller

/*
 * mvc.java
 *
 * Compile & run command:
 *     javac mvc.java && java MVC
 *
 * Pass data from view to controller
 *
 * This is a very basic example of how you can achieve it in a clean way.
 */
import java.util.Map;
import java.util.HashMap;
import java.util.Observable;
import java.util.Observer;

class Person {
    private String name;
    private int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }

    public String toString() {
        return name + ". " + age + " years old.";
    }
}

class PersonService {
    public Person create(String name, int age) {
        return new Person(name, age);
    }
}

interface View {
    public void display();
    public void addObserver(Observer o);
}

class CreatePersonView extends Observable implements View  {
    public void display() {
        System.out.println("\nWelcome to the create person view!");
        System.out.println("----------------------------------");

        System.out.print("Name: ");
        String name = System.console().readLine().trim();

        System.out.print("Age: ");
        int age = Integer.valueOf(System.console().readLine().trim());

        Map<String, Object> data = new HashMap<String, Object>();
        data.put("name", name);
        data.put("age", age);

        // generate the event
        setChanged();
        notifyObservers(data);
    }
}

class Controller implements Observer {

    PersonService service;

    public void setPersonService(PersonService service) {
                this.service = service;
        }

    public void update(Observable sender, Object arg) {
        Map data = (Map)arg;
        Person p = service.create((String)data.get("name"), (Integer)data.get("age"));

        //debug
        System.out.println("Created new person: " + p);
    }
}


class MVC {
    public static void main(String[] args) {
        View view = new CreatePersonView();
        Controller controller = new Controller();
        controller.setPersonService(new PersonService());
        view.addObserver(controller);
        view.display();
    }
}