How to avoid Not on FX application thread; currentThread = JavaFX Application Thread error?
Calling
Platform.runLater(new Runnable(){// do your GUI stuff here});will fix it.
This happened with me when i was modifying UI element from task in javafx 2 like listview elements.A Task Which Modifies The Scene Graph helped me to solve the issue i.e. updating UI elements by
final ListView<String> group = new ListView (); Task<Void> task = new Task<Void>() { @Override protected Void call() throws Exception { group.getItems().clear(); for (int i=0; i<100; i++) { Platform.runLater(new Runnable() { @Override public void run() { group.getItems.add(i); } }); } return null; } };
It should happens when you try to change some component UI, like a label text. Running like that works always:
@FXML Label myLabel;Platform.runLater(new Runnable(){ myLabel.setText("some text");});