How to get a handle of a new stage Controller JavaFX
<p>I am starting a 2nd scene that uses it's own controller. I want to access a method within that controller from another class. How can I get a handle of the new scene controller? </p>

<pre><code>public void startNewScene() throws IOException{
     Stage stage = new Stage();
     Partent root;
     root = FXMLLoader.load(getClass().getResource("fxmlfile.fxml");
     Scene scene = new Scene(root);
     Stage.setScene(scene);
     stage.show();

}
</code></pre>