Introduction

I'm starting to develop with the Play Framework. I'm making an ALL list template with it.

Problem

When I am instantiating my form in the controller it returns me the following error:

Would anyone know what the problem is?

Controller (Application.java)

package controllers;

import play.*;
import play.mvc.*;
import play.data.*;
import play.data.Form;

import views.html.*;

import models.*;

public class Application extends Controller {
    static Form<Task> taskForm = form(Task.class);

    public static Result index() {
        return redirect(routes.Application.tasks());
    }

    public static Result tasks() {
        return TODO;
    }

    public static Result newTask() {
        return TODO;
    }

    public static Result deleteTask(Long id) {
        return TODO;
    }

}