Javafx无法在Debian8 Arm Device NanoPC T3上运行

Question

My target

I want to run javafx on Linux Arm device, but failed!

NanoPC T3, there are some information:

fa@NanoPi3:~$ uname -a
Linux NanoPi3 3.4.39-s5p6818 #3 SMP PREEMPT Mon Jun 19 18:28:53 HKT 2017 armv7l GNU/Linux

fa@NanoPi3:~$ cat /etc/issue
Debian GNU/Linux 8 \n \l

fa@NanoPi3:~$ getconf LONG_BIT
32

Display: 7 in Capacitive screen (X710）

I had done：

1. Download jdk-8u144-linux-arm32-vfp-hflt.tar.gz
2. Download JavaFX Embedded SDK
3. Copy the files according javafxports

4. Write a sample app and package, run on my NanoPC T3:

    public class Main extends Application { @Override public void start(Stage primaryStage) { try { StackPane root = new StackPane(); Button btn = new Button(); btn.setText("Say 'Hello World'"); btn.setOnAction(new EventHandler<ActionEvent>() { @Override public void handle(ActionEvent event) { System.out.println("Hello World!"); } }); root.getChildren().add(btn); Scene scene = new Scene(root,400,400); scene.getStylesheets().add(getClass().getResource("application.css").toExternalForm()); primaryStage.setScene(scene); primaryStage.setTitle("Hello ARM"); primaryStage.show(); } catch(Exception e) { e.printStackTrace(); } } public static void main(String[] args) { launch(args); } } 

My problem

When I run the app by cammond: java -jar HelloArm.jar, system UI is not RESPONSABLE. But, I log in the device using ssh normally, also can see the thread java program:

ps -aux | grep java.

When I kill it, System UI get right again. I test adding some flag for java ( tips from here ):

-Dmonocle.platform=Monocle -Djavafx.debug=true -Dprism.order=sw

Some idea

1. I test Java swing, it is OK
2. I found that Javafx using monocle on linux. I don't know, X11 is uncorret for javafx? Or, I must be installed some thing for X11?

Answer 1

Finally, We found that we need to add -Djavafx.platform = eglfb , let the JavaFX rander the UI using eglfb .

Good luck.

Thanks.