Developer: I can't host a static website

[M E]

Hi

This code is in Restlet tutorial

// Create a component
Component component = new Component();
component.getServers().add(Protocol.HTTP, 8182);
component.getClients().add(Protocol.FILE);

// Create an application
Application application = new Application() {
    @Override
    public Restlet createRoot() {
        return new Directory(getContext(), ROOT_URI);
    }
};

// Attach the application to the component and start it
component.getDefaultHost().attach("", application);
component.start();

I can't have the navigated resource on my browser whatever the ROOT_URI
is, what is chances?