JavaFX: "Toolkit" not initialized when trying to play an mp3 file through MediaPlayer class

Question

I'm trying to make a simple mp3 play in the background of my program using the following:

Media med = new Media(getClass().getResource("intro.mp3").toExternalForm());
MediaPlayer mPlayer = new MediaPlayer(med);
mPlayer.play();

The intro.mp3 file is placed in the bin folder of my package, along with the other .class files.

The problem is that my program terminates with:

Exception in thread "main" java.lang.IllegalStateException: Toolkit not initialized

Full termination log is:

Device "Intel(R) HD Graphics Family" (\\.\DISPLAY1) initialization failed : 
WARNING: bad driver version detected, device disabled. Please update your driver to at least version 8.15.10.2302

Exception in thread "main" java.lang.IllegalStateException: Toolkit not initialized
    at com.sun.javafx.application.PlatformImpl.runLater(PlatformImpl.java:153)
    at com.sun.javafx.application.PlatformImpl.runLater(PlatformImpl.java:148)
    at javafx.application.Platform.runLater(Platform.java:52)
    at javafx.scene.media.MediaPlayer.init(MediaPlayer.java:450)
    at javafx.scene.media.MediaPlayer.<init>(MediaPlayer.java:365)
    at PokerApp.<init>(PokerApp.java:33)
    at PokerApp.main(PokerApp.java:105)

Anybody have any ideas as per the cause of the problem?

score 28 · Accepted Answer · edited Jun 24 '18 at 23:23

28

JavaFX performs "hidden" initialization on start. Running MediaPlayer doesn't trigger initialization.

The easiest ways to trigger it are:

have Application.launch() executed
have Application based program being run from jar packaged by fx ant tasks (e.g. built from Netbeans JavaFX project)
have JFXPanel started
call Platform.startup(Runnable) (Java 9+)

edited Jun 24 '18 at 23:23

Slaw

37,820
8
53
80

answered Dec 24 '12 at 21:52

Sergey Grinev

34,078
10
128
141

1

Will try it out and mark the question as the correct one if it works after I get home. Merry christmas to you, mister Sergey, and thank you for your answers in both my questions. – Dimitris Sfounis Dec 25 '12 at 09:20
1

I placed a single JFXPanel fxPanel = new JFXPanel(); in my constructor and everything worked out fine. Is it recommended I use a JFXPanel instead of a JPanel or a Container when I use JavaFX with SWING? – Dimitris Sfounis Dec 26 '12 at 10:22
you can put fx nodes only into JFXPanel, so it's definitely recommended to use it if you want to have Swing app with JavaFX features. – Sergey Grinev Dec 26 '12 at 11:56
What would I do if, say, I was running headless? – Ruraj Aug 20 '15 at 10:56
I don't think JavaFX supports headless – Sergey Grinev Aug 20 '15 at 11:42

score 15 · Answer 2 · answered Apr 07 '17 at 11:49

To avoid initialization Exception you have to either invoke Application.launch() method or simply instantiate a new JFXPanel() class (even if it isn’t used for anything). This will initiate JavaFxRuntime when application is started

To instantiate JFXPanel add below line in your code

 final JFXPanel fxPanel = new JFXPanel();

Import following package

import javafx.embed.swing.JFXPanel;

score 5 · Answer 3 · answered Aug 10 '16 at 20:59

5

There's also way to initialize toolkit explicitly, by calling: com.sun.javafx.application.PlatformImpl#startup(Runnable)

Little bit hacky, due to using *Impl, but is useful, if you don't want to use Application or JXFPanel for some reason.

answered Aug 10 '16 at 20:59

krzychek

300
3
9

score 3 · Answer 4 · answered Jun 27 '17 at 13:57

3

see http://www.programcreek.com/java-api-examples/index.php?api=com.sun.javafx.application.PlatformImpl

com.sun.javafx.application.PlatformImpl.startup(()->{});

answered Jun 27 '17 at 13:57

Wolfgang Fahl

15,016
11
93
186

JavaFX: "Toolkit" not initialized when trying to play an mp3 file through MediaPlayer class

4 Answers4

Linked

Related