GlassFish: java.lang.NoClassDefFoundError: org/jdesktop/layout/GroupLayout$

Question

Hi,
I am new to java, liked the tool nebeans and want to shift to it.
I created a desktop swing application containing one blank form only, set its property to run on JWS. It works fine, then I created a project for deploying the app on GlassFish. Verified it, it gave no error. But on launching the app from GlassFish V2 b58g, I get following error;
java.lang.reflect.InvocationTargetException
     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
     at java.lang.reflect.Constructor.newInstance(Unknown Source)
     at com.sun.enterprise.appclient.jws.boot.JWSACCMain.run(JWSACCMain.java:218)
     at com.sun.enterprise.appclient.jws.boot.JWSACCMain.main(JWSACCMain.java:177)
     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 com.sun.javaws.Launcher.executeApplication(Unknown Source)
     at com.sun.javaws.Launcher.executeMainClass(Unknown Source)
     at com.sun.javaws.Launcher.doLaunchApp(Unknown Source)
     at com.sun.javaws.Launcher.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.RuntimeException: java.lang.NoClassDefFoundError: org/jdesktop/layout/GroupLayout$Group
     at com.sun.enterprise.appclient.MainWithModuleSupport.<init>(MainWithModuleSupport.java:454)
     ... 15 more
Caused by: java.lang.NoClassDefFoundError: org/jdesktop/layout/GroupLayout$Group
     at java.lang.Class.getDeclaredMethods0(Native Method)
     at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
     at java.lang.Class.getMethod0(Unknown Source)
     at java.lang.Class.getMethod(Unknown Source)
     at com.sun.enterprise.util.Utility.invokeApplicationMain(Utility.java:236)
     at com.sun.enterprise.appclient.MainWithModuleSupport.<init>(MainWithModuleSupport.java:417)
     ... 15 more
Please help me out.
Thanks
Krishnan

Answer 1

krishnan wrote: I am new to java, liked the tool nebeans and want to shift to it.
Since, at one post, it seems you are not just new to Netbeans, Java and JWS, but also the Sun forums, I will take this moment to point out that adding Dukes to a question encourages replies, and can be done at any point in a thread.
krishnan wrote: Caused by: java.lang.NoClassDefFoundError: org/jdesktop/layout/GroupLayout$Group ..
This is usually caused by the lack of the Jar containing the named class, in the application classpath. The application classpath is specified in the JNLP file.
GroupLayout is also a Netbeans specific class. I recommend coding most GUIs in core J2SE layouts, to avoid you having to supply the Jar, and the user to download it.
If you try to add the jar without success, it would be helpful to know the basic 'layout' of the server (e.g. describe where all the resources, including the JNLP file(s) and jar(s) are located) and the content of the JNLP file.
Note also that Netbeans makes horrid JNLP files. You are better off writing your own and ensuring Netbeans never gets the idea it is expected to edit it. You can do this by abandoning some of the 'click a button' ease that you apparently quite like, and using Ant to build and deploy the project.
Ant adds a bit more learning, but is well worth the effort, as projects that can be worked on in Netbeans, can also be worked on using Eclipse (and every other IDE that supports Ant), or can be built from the command line.