I had a similar issue which I fixed without using the Platform.runLater()
:
"java.lang.IllegalStateException: Not on FX application thread; currentThread = Thread-6"
Button play = new Button("Play");
EventHandler<ActionEvent> playHandler = e1 -> {
Runnable runnable = () -> {
play.setText("Pause");
EventHandler<ActionEvent> timelineHandler e2 -> play();
timeline = new Timeline(new KeyFrame(Duration.millis(2000), timelineHandler));
timeline.setCycleCount(Timeline.INDEFINITE);
timeline.play();
};
Thread t = new Thread(runnable);
t.start();
};
play.setOnAction(playHandler);
SOLVED! Move everything unrelated outside of the runnable
lambda:
Button play = new Button("Play");
EventHandler<ActionEvent> playHandler = e1 -> {
play.setText("Pause");
Runnable runnable = () -> {
EventHandler<ActionEvent> timelineHandler e2 -> play();
timeline = new Timeline(new KeyFrame(Duration.millis(2000), timelineHandler));
timeline.setCycleCount(Timeline.INDEFINITE);
timeline.play();
};
Thread t = new Thread(runnable);
t.start();
};
play.setOnAction(playHandler);