WebcamStudio For GNU/Linux / Tickets / #98 java.lang.ClassNotFoundException: com.sun.jna.Library

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Anonymous - 2013-11-01

Originally posted by: Overmind...@gmail.com

Same thing with the AWT code, missing manifest link or code inclusion.

*Originally posted by:* [Overmind...@gmail.com](http://code.google.com/u/105110428288284907934/) Same thing with the AWT code, missing manifest link or code inclusion.

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Anonymous - 2013-11-03

Originally posted by: soylent...@gmail.com

Hi,
i use NetbeansIde to modify WS code so i compile with it and it build and runs well. I try to checkout the svn and `ant clean jar` and i got the same issues.
Please can you provide me the correct changes i have to make to let WS svn run well compilig with ant?
Sorry but i don't have much time to look for this issue.
Thanks.
Karl.

*Originally posted by:* [soylent...@gmail.com](http://code.google.com/u/108633206357681875841/) Hi, i use NetbeansIde to modify WS code so i compile with it and it build and runs well. I try to checkout the svn and \`ant clean jar\` and i got the same issues. Please can you provide me the correct changes i have to make to let WS svn run well compilig with ant? Sorry but i don't have much time to look for this issue. Thanks. Karl.

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Anonymous - 2013-11-14

Originally posted by: groca...@gmail.com

same problem for in fedora19
how did u fix the problem?

*Originally posted by:* [groca...@gmail.com](http://code.google.com/u/111617774895293419359/) same problem for in fedora19 how did u fix the problem?

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Anonymous - 2013-11-20

Originally posted by: johnfwhi...@gmail.com

same problem in openSuse 12.2 with openJDK 1.7 although not 100% sure of build and execution instructions. I'm just using "java -jar dist/WebcamStudio.jar"

*Originally posted by:* [johnfwhi...@gmail.com](http://code.google.com/u/114667982782008407350/) same problem in openSuse 12.2 with openJDK 1.7 although not 100% sure of build and execution instructions. I'm just using "java -jar dist/[WebcamStudio](https://code.google.com/p/webcamstudio/wiki/WebcamStudio).jar"

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Anonymous - 2013-12-13

Originally posted by: donperfe...@gmail.com

same problem in ubuntu 13.10 w/openjdk1.7

Code untouched

*Originally posted by:* [donperfe...@gmail.com](http://code.google.com/u/108821392502324252471/) same problem in ubuntu 13.10 w/openjdk1.7 Code untouched

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Anonymous - 2013-12-17

Originally posted by: Overmind...@gmail.com

Oh sorry for the delay, I fixed it by one-jar'ing the build so it included all the library jars inside it, the easy way for the lazy programmer.

*Originally posted by:* [Overmind...@gmail.com](http://code.google.com/u/105110428288284907934/) Oh sorry for the delay, I fixed it by one-jar'ing the build so it included all the library jars inside it, the easy way for the lazy programmer.

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Anonymous - 2013-12-18

Originally posted by: soylent...@gmail.com

Thank you very much OvermindDL1.
karl.

*Originally posted by:* [soylent...@gmail.com](http://code.google.com/u/108633206357681875841/) Thank you very much OvermindDL1. karl.

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Anonymous - 2014-01-02

Originally posted by: wwwc...@gmail.com

again. on the contents of the manifest.fm does not respond. Not seeing jna !

java -jar /usr/lib/webcamstudio/WebcamStudio.jar
Welcome to WebcamStudio 0.65 build 519 ...
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:800)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        at webcamstudio.exporter.vloopback.VideoDevice.openDevice(VideoDevice.java:46)
        at webcamstudio.exporter.vloopback.VideoDevice.loadInfo(VideoDevice.java:40)
        at webcamstudio.exporter.vloopback.VideoDevice.<init>(VideoDevice.java:36)
        at webcamstudio.exporter.vloopback.VideoDevice.getDevices(VideoDevice.java:147)
        at webcamstudio.exporter.vloopback.VideoDevice.getInputDevices(VideoDevice.java:106)
        at webcamstudio.components.OutputPanel.paintWSCamButtons(OutputPanel.java:588)
        at webcamstudio.components.OutputPanel.<init>(OutputPanel.java:96)
        at webcamstudio.WebcamStudio.<init>(WebcamStudio.java:78)
        at webcamstudio.WebcamStudio$25.run(WebcamStudio.java:1528)
        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$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        ... 35 more

*Originally posted by:* [wwwc...@gmail.com](http://code.google.com/u/106257945191684545014/) again. on the contents of the manifest.fm does not respond. Not seeing jna \! java -jar /usr/lib/webcamstudio/[WebcamStudio](https://code.google.com/p/webcamstudio/wiki/WebcamStudio).jar Welcome to [WebcamStudio](https://code.google.com/p/webcamstudio/wiki/WebcamStudio) 0.65 build 519 ... 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$ClassLoader.java:800$         at java.security.SecureClassLoader.defineClass$SecureClassLoader.java:142$         at java.net.URLClassLoader.defineClass$URLClassLoader.java:449$         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$ClassLoader.java:425$         at sun.misc.Launcher$AppClassLoader.loadClass$Launcher.java:308$         at java.lang.ClassLoader.loadClass$ClassLoader.java:358$         at webcamstudio.exporter.vloopback.VideoDevice.openDevice$VideoDevice.java:46$         at webcamstudio.exporter.vloopback.VideoDevice.loadInfo$VideoDevice.java:40$         at webcamstudio.exporter.vloopback.VideoDevice.<init>$VideoDevice.java:36$         at webcamstudio.exporter.vloopback.VideoDevice.getDevices$VideoDevice.java:147$         at webcamstudio.exporter.vloopback.VideoDevice.getInputDevices$VideoDevice.java:106$         at webcamstudio.components.OutputPanel.paintWSCamButtons$OutputPanel.java:588$         at webcamstudio.components.OutputPanel.<init>$OutputPanel.java:96$         at webcamstudio.[WebcamStudio](https://code.google.com/p/webcamstudio/wiki/WebcamStudio).<init>$[WebcamStudio](https://code.google.com/p/webcamstudio/wiki/WebcamStudio).java:78$         at webcamstudio.[WebcamStudio](https://code.google.com/p/webcamstudio/wiki/WebcamStudio)$25.run$[WebcamStudio](https://code.google.com/p/webcamstudio/wiki/WebcamStudio).java:1528$         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$ClassLoader.java:425$         at sun.misc.Launcher$AppClassLoader.loadClass$Launcher.java:308$         at java.lang.ClassLoader.loadClass$ClassLoader.java:358$         ... 35 more

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Anonymous - 2014-01-03

Originally posted by: soylent...@gmail.com

Hi wwwcase,
can you get the program running by simply type in terminal:

$ webcamstudio

I imagine that you installed WS from PPAs on Ubuntu.

Here is is the WebcamStudio launcher, maybe useful:

# Check if webcamstudio or v4l2loopback module are available...
lsmod | grep webcamstudio >/dev/null
if [ "$?" -eq "1" ]; then
    lsmod | grep v4l2loopback >/dev/null
    if [ "$?" -eq "1" ]; then
        echo "None of the kernel modules webcamstudio/v4l2loopback are loaded..."
        zenity --warning --text "None of the kernel modules webcamstudio/v4l2loopback are loaded...\nThe virtual webcam will not be available..."
    fi
fi

# Include java-wrappers
. /usr/lib/java-wrappers/java-wrappers.sh

JAVA_CLASSPATH="${INSTALLDIR}/*:${INSTALLDIR}/lib/*"
JAVA_ARGS="-Djna.nosys=true -splash:start.gif"

find_java_runtime openjdk sunmin5

find_jars AbsoluteLayout \ AppFramework \ commons-cli \ commons-codec \ commons-httpclient \ commons-lang3 \ jcl-over-slf4j \ jsr305 \ log4j-1.2 \ netty \ slf4j-api \ slf4j-log4j12 \ swing-worker

cd ${INSTALLDIR}

run_java webcamstudio.WebcamStudio "$@"

karl

*Originally posted by:* [soylent...@gmail.com](http://code.google.com/u/108633206357681875841/) Hi wwwcase, can you get the program running by simply type in terminal: $ webcamstudio I imagine that you installed WS from PPAs on Ubuntu. Here is is the [WebcamStudio](https://code.google.com/p/webcamstudio/wiki/WebcamStudio) launcher, maybe useful: \# Check if webcamstudio or v4l2loopback module are available... lsmod | grep webcamstudio >/dev/null if \[ "$?" -eq "1" \]; then     lsmod | grep v4l2loopback >/dev/null     if \[ "$?" -eq "1" \]; then         echo "None of the kernel modules webcamstudio/v4l2loopback are loaded..."         zenity --warning --text "None of the kernel modules webcamstudio/v4l2loopback are loaded...\nThe virtual webcam will not be available..."     fi fi \# Include java-wrappers . /usr/lib/java-wrappers/java-wrappers.sh JAVA\_CLASSPATH="$\{INSTALLDIR\}/\*:$\{INSTALLDIR\}/lib/\*" JAVA\_ARGS="-Djna.nosys=true -splash:start.gif" find\_java\_runtime openjdk sunmin5 find\_jars AbsoluteLayout \   AppFramework \   commons-cli \   commons-codec \   commons-httpclient \   commons-lang3 \   jcl-over-slf4j \   jsr305 \   log4j-1.2 \   netty \   slf4j-api \   slf4j-log4j12 \   swing-worker cd $\{INSTALLDIR\} run\_java webcamstudio.[WebcamStudio](https://code.google.com/p/webcamstudio/wiki/WebcamStudio) "$@" karl

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Anonymous - 2014-01-05

Originally posted by: wwwc...@gmail.com

Thanks, I install java-wrappers from deb-package on archlinux and run webcamstudio nice!

*Originally posted by:* [wwwc...@gmail.com](http://code.google.com/u/106257945191684545014/) Thanks, I install java-wrappers from deb-package on archlinux and run webcamstudio nice\!

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Anonymous - 2014-01-06

Originally posted by: soylent...@gmail.com

Thanks for the feedback.
karl

*Originally posted by:* [soylent...@gmail.com](http://code.google.com/u/108633206357681875841/) Thanks for the feedback. karl

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Anonymous - 2014-01-17

Originally posted by: Drayg...@gmail.com

Why are several of you using OpenJDK? It had been known to cause problems with multiple different Java applications on both Linux and OSX. As soon as I get a Gentoo or Arch system up and running, I immediately get JDK 7 from Oracle's website and install it through portage or pacman. And, even when I used to use Ubuntu, I removed OpenJDK and installed JDK7 anyways since it saved me a lot of headaches in the long-run.

Now, mind you, it's been quite some time since I last used OpenJDK, so it may now be fully functional and equal to the real thing. But, I'm curious about this since I primarily use Java for development purposes anyways.

*Originally posted by:* [Drayg...@gmail.com](http://code.google.com/u/118052940691888779027/) Why are several of you using OpenJDK? It had been known to cause problems with multiple different Java applications on both Linux and OSX. As soon as I get a Gentoo or Arch system up and running, I immediately get JDK 7 from Oracle's website and install it through portage or pacman. And, even when I used to use Ubuntu, I removed OpenJDK and installed JDK7 anyways since it saved me a lot of headaches in the long-run. Now, mind you, it's been quite some time since I last used OpenJDK, so it may now be fully functional and equal to the real thing. But, I'm curious about this since I primarily use Java for development purposes anyways.

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Anonymous - 2014-08-30

Originally posted by: ryanvade...@gmail.com

Is there any fix? Installing java-wrappers from the ubunt repos did nothing for me on Arch.

Also, openjdk is just as good as jdk. And for the most part works better for me than jdk.

*Originally posted by:* [ryanvade...@gmail.com](http://code.google.com/u/118212958603728562292/) Is there any fix?  Installing java-wrappers from the ubunt repos did nothing for me on Arch. Also, openjdk is just as good as jdk. And for the most part works better for me than jdk.

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Anonymous - 2014-12-31

Originally posted by: sheganin...@gmail.com

Note, this post has high relavance to this thread, solved my problem (Gives changes to manifest, not just implies them): https://plus.google.com/106438997055822510250/posts/CiaGVe5FFaQ

*Originally posted by:* [sheganin...@gmail.com](http://code.google.com/u/117547518079934145737/) Note, this post has high relavance to this thread, solved my problem $Gives changes to manifest, not just implies them$: [https://plus.google.com/106438997055822510250/posts/CiaGVe5FFaQ](https://plus.google.com/106438997055822510250/posts/CiaGVe5FFaQ)

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java.lang.ClassNotFoundException: com.sun.jna.Library

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#98 java.lang.ClassNotFoundException: com.sun.jna.Library

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