B4J Question Cannot start b4j app (Windows 10)

[francoisg]

Hi,
I am having trouble with B4jJ - I can compile an application without any issues but when it tries to run (Debug/Release mode) I get the following errors. When I start the .jar file manually it works without any issues. Any idea of what I am missing?

java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.NullPointerException
at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:358)
at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:303)
... 5 more
java.lang.ExceptionInInitializerError
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:344)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplicationWithArgs$148(LauncherImpl.java:327)
at com.sun.javafx.application.LauncherImpl$$Lambda$43/1558600329.run(Unknown Source)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$166(PlatformImpl.java:323)
at com.sun.javafx.application.PlatformImpl$$Lambda$45/1051754451.run(Unknown Source)
at com.sun.javafx.application.PlatformImpl.lambda$null$164(PlatformImpl.java:292)
at com.sun.javafx.application.PlatformImpl$$Lambda$47/135597710.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$165(PlatformImpl.java:291)
at com.sun.javafx.application.PlatformImpl$$Lambda$46/1775282465.run(Unknown Source)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$141(WinApplication.java:102)
at com.sun.glass.ui.win.WinApplication$$Lambda$37/1109371569.run(Unknown Source)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.RuntimeException: java.lang.NoClassDefFoundError: javafx/scene/control/Dialog
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:114)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:90)
at b4j.example.main.<clinit>(main.java:17)
... 16 more
Caused by: java.lang.NoClassDefFoundError: javafx/scene/control/Dialog
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:260)
at anywheresoftware.b4a.shell.Shell.getCorrectClassName(Shell.java:499)
at anywheresoftware.b4a.shell.Shell.createObject(Shell.java:486)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:243)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:158)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:93)
... 18 more
Caused by: java.lang.ClassNotFoundException: javafx.scene.control.Dialog
at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 29 more


My setup:
javac.exe: C:\Program Files\Java\jdk1.8.0_31\bin\javac.exe

 

[Erel]

Java 8u40+ is required.

 

[wexican]

I'm also using windows 10 & my java version is C:\Program Files\Java\jdk1.8.0_74\bin\javac.exe but get the below message, I had no problems before with an older version of B4J & Java 7, but recently updated all & also cannot run the program on the Rpi.

Program started.
main._process_globals (java line: 326)
java.lang.NoClassDefFoundError: javafx/scene/control/Dialog
at b4j.example.main._process_globals(main.java:326)
at b4j.example.main.initializeProcessGlobals(main.java:317)
at b4j.example.main.start(main.java:33)
at com.sun.javafx.application.LauncherImpl$8.run(LauncherImpl.java:837)
at com.sun.javafx.application.PlatformImpl$7.run(PlatformImpl.java:335)
at com.sun.javafx.application.PlatformImpl$6$1.run(PlatformImpl.java:301)
at com.sun.javafx.application.PlatformImpl$6$1.run(PlatformImpl.java:298)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl$6.run(PlatformImpl.java:298)
at com.sun.glass.ui.lens.LensApplication$RunnableEvent.dispatch(LensApplication.java:182)
at com.sun.glass.ui.lens.LensApplication._runLoop(LensApplication.java:860)
at com.sun.glass.ui.lens.LensApplication.access$1800(LensApplication.java:58)
at com.sun.glass.ui.lens.LensApplication$4.run(LensApplication.java:917)
at java.lang.Thread.run(Thread.java:744)
Caused by: jav
a.lang.ClassNotFoundException: javafx.scene.control.Dialog
at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 14 more

Any ideas would be much appreciated, thanks.

Edit: My program runs on the desktop PC but won't on the Raspberry Pi, I think it may be more to do with JavaFx or lack of it on the RPi!

Edit1: On a different RPi with latest version of raspbian I seem to get this: Error: JavaFX runtime components are missing, and are required to run this application. it is using java version 1.8.0_76-ea

 

[Siam]

hello,

on raspberry you can't use apps with UI because oracle have removed the JavaFX functions in the latest java package.

if you need this funktion take a look on this threat:
https://www.b4x.com/android/forum/threads/javafx-installation-on-raspberry-pi-help-needed.63403/

regards
Andy

 

[wexican]

hello,

on raspberry you can't use apps with UI because oracle have removed the JavaFX functions in the latest java package.

if you need this funktion take a look on this threat:
https://www.b4x.com/android/forum/threads/javafx-installation-on-raspberry-pi-help-needed.63403/

regards
Andy

Hi Andy,

Thanks for the tip, just did exactly as in the post you suggested & it now works nicely, really appreciate that thank you!

Tom