how to stop “JavaFX Application Thread”

Question

I have a simple console application which sometimes need to perform graphics operations, for those I\'m using JavaFx framework (there are some functions that I need like the

Answer 1

Fix:

I was able to fix this problem by calling com.sun.javafx.application.PlatformImpl.tkExit() immediately before Platform.exit(). I don't really understand the JavaFX source that well, but it seems to be working; YMMV.

Update: Doing this in Java 8 will produce a warning, you can just turn the warning off with @SuppressWarnings("restriction"). It shouldn't be a problem.

Explanation:

I figured this out by digging through the source code; JFXPanel has this little snippet (this is from JavaFX 2.2.25)

finishListener = new PlatformImpl.FinishListener() {
  public void idle(boolean paramAnonymousBoolean) {
    if (!JFXPanel.firstPanelShown) {
      return;
    }
    PlatformImpl.removeListener(JFXPanel.finishListener);
    JFXPanel.access$102(null);
    if (paramAnonymousBoolean)
      Platform.exit();
  }

  public void exitCalled()
  {
  }

The problem is, if you are using only a little bit of JavaFX in your application, then the idle(boolean) method never does anything (because firstPanelShown == false), which prevents the listener from getting removed, which prevents the JavaFX Toolkit from shutting down... which means you have to shut it down manually.

Answer 2

I tried a lot of things on this as none of the above answers worked for me. Best thing for me was to just shutdown the whole JVM using

System.exit(1);

as my whole Application is just that one JavaFX application and therefor can be shut down, when closing the Stage. The 1 in my case is just a random int.

Answer 3

That's a slippery situation, as (to my understanding) the purpose of the JavaFX thread is to take advantage of various hardware pipelines transparently. Might I suggest placing your JavaFX requests in a separate, referenced, project; and keep everything else, including your main method, in another? That's always worked for me.

Basically, business logic and model go in one project, and view and control (generally JavaFX-based) go in the other. This allows for independent termination of the JavaFX thread. Hopefully that is applicable to what you are trying to do.

Answer 4

Your main function does not belong to the JavaFx Application object and i think that your program never eneter application thread loop.

It seems you should do:

public class SOTestFX extends Application {
    public static void main(String[] args) {
        launch(args);
    }
    @Override
    public void start(Stage stage) throws Exception {
        // Do stuff here to show your stage or whatever you want;
        // This will be called on the JavaFX thread
    }
}