the circumstances are as described in the title. I get the following error:

1. Exception in thread "Animation Thread" java.lang.UnsupportedClassVersionError: Bad version number in .class file
2. at java.lang.ClassLoader.defineClass2(Native Method)
3. at java.lang.ClassLoader.defineClass(ClassLoader.java:775)
4. at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:160)
5. at java.net.URLClassLoader.defineClass(URLClassLoader.java:254)
6. at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
7. at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
8. at java.security.AccessController.doPrivileged(Native Method)
9. at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
10. at java.lang.ClassLoader.loadClass(ClassLoader.java:317)
11. at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:280)
12. at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
13. at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:375)
14. at java.lang.Class.getDeclaredMethods0(Native Method)
15. at java.lang.Class.privateGetDeclaredMethods(Class.java:2395)
16. at java.lang.Class.getMethod0(Class.java:2642)
17. at java.lang.Class.getMethod(Class.java:1579)
18. at guicomponents.GComponent.createEventHandler(GComponent.java:203)
19. at guicomponents.GButton.buttonCtorCore(GButton.java:160)
20. at guicomponents.GButton.<init>(GButton.java:98)
21. at WLANLocator.setup(WLANLocator.java:34)
22. at processing.core.PApplet.handleDraw(PApplet.java:1571)
23. at processing.core.PApplet.run(PApplet.java:1496)
24. at java.lang.Thread.run(Thread.java:613)

For startup I use this main method:

1. public static void main(String args[]) {
2.    PApplet.main(new String[] { "--display=1", "WLANLocator" });   
3. }

The error seems to be deep into G4P's event system but I found a strange solution (not realy a solution) to the problem. In my main class (the one derived from PApplet) I defined a method that returns a self defined class. If I remove this method or change the return type to void the error disappears.

I realy need my self defined methods in the main class. I don't know what the two things have to do with each other …. Maybe this is a beginners error but to me it sounds very strange.

Greetings,

erniejunior