JAVA ДЛЯ ПОТОКОВ ИВБО / ПР-12 ВАР 3 / Application

public class Application {
    private Button button;
    private CheckBox checkbox;

    public Application(GUIFactory factory) {
        button = factory.createButton();
        checkbox = factory.createCheckBox();
    }

    public void paint() {
        button.draw();
        checkbox.draw();
    }

    public static void main(String[] args) {
        GUIFactory factory;

        String os = System.getProperty("os.name").toLowerCase();
        if (os.contains("mac")) {
            factory = new WinFactory();
        } else {
            factory = new MacFactory();
        }

        Application app = new Application(factory);
        app.paint();
    }
}