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POPass object from one scene to another
 

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    <p>As I'm learning the new world of JavaFX2 I stumbled on another annoying problem. I'm developing a program with multiple scenes (~10 scenes). For that I created a small class like this:</p> <pre><code>public class SceneSelector { ... public void setScene(Stage stage, String fxmlfilename, ObservableList ol) throws Exception{ String s = "../" + fxmlfilename; Parent root = FXMLLoader.load(getClass().getResource(s)); root.setUserData(ol); Scene scene = new Scene(root); stage.setScene(scene); //show the stage stage.show(); } } </code></pre> <p>This class works good enough for switching between the scenes. Now the problem is that I sometimes need to pass data from Scene1 to Scene2. I'm trying to do this by setting the <code>setUserData()</code> for the new scene which basicly works exept for one thing. How can I get the userdata when the new Scene is beeing initialized? (because the Nodes are still null at that time)</p> <p>Code at scene1:</p> <pre><code>//Code connected to a button that opens the new Scene private void openLabID(ActionEvent event) throws Exception { final Stage primaryStage = (Stage) btnNewScene.getScene().getWindow(); ObservableList&lt;Koe&gt; olAfTeWerkenKoeien = DA_Koe.getAfTeWerkenKoeien(); ss.setScene(primaryStage, "GUI/scenes/koe/Koe.fxml", olAfTeWerkenKoeien); } </code></pre> <p>Code at scene2:</p> <pre><code>public void initialize(URL url, ResourceBundle rb) { Scene s = lbl.getScene(); ObservableList&lt;Koe&gt; olAfTeWerkenKoeien = (ObservableList&lt;Koe&gt;) s.getRoot().getUserData(); System.out.println(olAfTeWerkenKoeien.size()); } </code></pre> <p>Of course Scene s gives a null value at this point (because lbl is null at this point), so I wonder, is there a method that is beeing fired right after initialize?</p> <p>When I attach this code to a button on Scene2, it works like a charm, but it should be loaded automatically.</p> <p>EDIT: The setting of the data with the setMyData() method is not a problem, however retrieving it is:</p> <pre><code>public ObservableList&lt;Koe&gt; getMyData() { return this.myData; } </code></pre> <p>How can I get the CustomScene object when a controller initializes? Because doing this below will result in a NullPointerException (because btnSluiten is not initialized just yet):</p> <pre><code>@Override public void initialize(URL url, ResourceBundle rb) { ... Stage stage = (Stage) btnSluiten.getScene().getWindow(); CustomScene cs = (CustomScene) stage.getScene(); ObservableList&lt;Koe&gt; olKoe = cs.getMyData(); System.out.println(olKoe.size()); } </code></pre>
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