Interfaces Graphiques : Que pensez vous de l'héritage multiple en JavaFX ?

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def individual = Contact { firstName: "Julien", lastName: "Jabbot", role: "Senior Developer" };
//~ individual.printInfo();
//~ println(individual.id);
(individual as Person).printInfo();
(individual as Employee).printInfo();
println("{(individual as Person).id}");
println("{(individual as Employee).id}");

mixin class Person
{
  var firstName = "Fabien";
  var lastName = "Flubbler";
  var id = 89771;
  function printInfo()
  {
    println("{firstName} {lastName}");
  }
  abstract function isAlive();
}
mixin class Employee
{
  var role = "Project Manager";
  var id = 11666342;
  function printInfo()
  {
    println("{role}");
  }
}

class Contact extends Person, Employee { override function isAlive() { return Person.id > 0; } }

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var m:MyMixin = new MyMixin();      // ILLEGAL. COMPILER ERROR.

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var m:MyMixin = MyMixin {           // ILLEGAL. COMPILER ERROR.
    variable1: "Hello Again"
    variable2: "World"
}

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import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.AbstractAction;

// Interface.
def actionListener:ActionListener = ActionListener {
    public override function actionPerformed(e:ActionEvent):Void {
    }
}
// Classe abstraite.
def action:AbstractAction = AbstractAction {
    public override function actionPerformed(e:ActionEvent):Void {
    }    
}