java.lang.UnsupportedClassVersionError

Question

java.lang.UnsupportedClassVersionError

fvhde opened this issue 6 years ago · comments

I'm using Java 8 and i got this error

jfxtras/scene/control/agenda/Agenda$AppointmentGroup has been compiled by a more recent version of the Java Runtime (class file version 53.0), this version of the Java Runtime only recognizes class file versions up to 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplicationWithArgs$155(LauncherImpl.java:352)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$174(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null$172(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$173(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$147(WinApplication.java:177)
at java.lang.Thread.run(Unknown Source)
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.launcher.LauncherHelper$FXHelper.main(Unknown Source)
Caused by: java.lang.NullPointerException
at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:383)
at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
... 5 more

Tom Eugelink · Answer 1 · Tue Dec 25 2018 06:09:34 GMT+0800 (China Standard Time)

What version of JFXtras did you include in your project? 53.0 is Java 9.

Fahde Sorgho · Answer 2 · Tue Dec 25 2018 06:13:39 GMT+0800 (China Standard Time)

I'm using version 9.0, i've started my project with java 8 and i tried to add JFXtras agenda

Tom Eugelink · Answer 3 · Tue Dec 25 2018 15:57:53 GMT+0800 (China Standard Time)

Apparently you are running your application with Java 8 then. JFXtras 9 is compiled with Java 9, you need to run it with Java 9.

Fahde Sorgho · Answer 4 · Tue Dec 25 2018 16:17:42 GMT+0800 (China Standard Time)

Il there is no way to avoid Jfxtras for Java 8? I'm scared of the problems of dependence if I go to Java 9

Tom Eugelink · Answer 5 · Tue Dec 25 2018 16:19:03 GMT+0800 (China Standard Time)

JFXtras 8 is for Java 8.

Fahde Sorgho · Answer 6 · Tue Dec 25 2018 16:19:58 GMT+0800 (China Standard Time)

Thank you I will try with version 8