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 css styling for text ) I simply generate some shapes and text into an hidden scene then save those on file and that's all, I know that to work with JavaFx I have to pass graphics operations to the JavaFx thread, but when everything is done and I have to close the application (after some hours) this JavaFx thread still remain open... and I really don't want to force exit with System.exit() because if something is blocked I may want to know/wait (ALSO I don't want to execute everything as an JavaFx application (as JavaFx components are less than 1% of my main application) the code is very simple and googling around I've found only to use ``` Platform.exit(); ``` which doesn't seems to work, I've also tried playing with Platform parameters like ``` Platform.setImplicitExit(false); ``` here is my test application which…

Accepted Answer

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.

how to stop "JavaFX Application Thread"

Solution

Problem