java.lang.ClassNotFoundException: com.sun.jna.Library #98
Description
What steps will reproduce the problem?
1. Download WebcamStudio
2. `ant clean jar`
3. Run WebcamStudio
What is the expected output?
It launching without exception
What do you see instead?
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError:
com/sun/jna/Library
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:788)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:447)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at webcamstudio.exporter.vloopback.VideoDevice.openDevice(VideoDevice.java:44)
at webcamstudio.exporter.vloopback.VideoDevice.loadInfo(VideoDevice.java:38)
at webcamstudio.exporter.vloopback.VideoDevice.<init>(VideoDevice.java:34)
at webcamstudio.exporter.vloopback.VideoDevice.getDevices(VideoDevice.java:145)
at webcamstudio.exporter.vloopback.VideoDevice.getInputDevices(VideoDevice.java:104)
at webcamstudio.components.OutputPanel.<init>(OutputPanel.java:59)
at webcamstudio.WebcamStudio.<init>(WebcamStudio.java:56)
at webcamstudio.WebcamStudio$11.run(WebcamStudio.java:606)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:694)
at java.awt.EventQueue$3.run(EventQueue.java:692)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:447)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at webcamstudio.exporter.vloopback.VideoDevice.openDevice(VideoDevice.java:44)
at webcamstudio.exporter.vloopback.VideoDevice.loadInfo(VideoDevice.java:38)
at webcamstudio.exporter.vloopback.VideoDevice.<init>(VideoDevice.java:34)
at webcamstudio.exporter.vloopback.VideoDevice.getDevices(VideoDevice.java:145)
at webcamstudio.exporter.vloopback.VideoDevice.getInputDevices(VideoDevice.java:104)
at webcamstudio.components.OutputPanel.<init>(OutputPanel.java:59)
at webcamstudio.WebcamStudio.<init>(WebcamStudio.java:56)
at webcamstudio.WebcamStudio$11.run(WebcamStudio.java:606)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:694)
at java.awt.EventQueue$3.run(EventQueue.java:692)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
Caused by: java.lang.ClassNotFoundException: com.sun.jna.Library
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 34 more
The Operating system you are using (Linux, Windows etc)?
Linux <snip> 3.8.0-29-generic #42-Ubuntu SMP Tue Aug 13 19:40:39 UTC 2013
x86_64 x86_64 x86_64 GNU/Linux
What version of WebcamStudio are you using?
Same issue with both the webcamstudio_0.61.tar.bz2 download as well as the
latest svn source
What version of Java are you using?
Tried OpenJDK7 25, OpenJDK6, and SunJDK6, all same error
I was able to fix it in the latest source by correcting the manifest, which
appears to be missing the JNA library.
Original issue reported on code.google.com by Overmind...@gmail.com on 1 Nov 2013 at 10:29