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I have been using Netbeans IDE over 2 years now, and I have been enormously satisfied with the features and stability it provides during development in Ruby on Rails. However this morning probably some java classes have been found missing that I came to know via an EXCEPTION window when I tried opening Netbeans IDE. Following is the error, and I hope, would help your team to fix it.. Unexpected Exception --------------------- A java.lang.NoClassDefFoundError exception has occurred. Below it was the Message that said about Me notifying it to your team with the issues url and then the ERROR STACK TRACE when I clicked Show Details- -------------------------------------- java.lang.NoClassDefFoundError: Could not initialize class org.netbeans.modules.uihandler.Installer at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at org.openide.util.SharedClassObject.createInstancePrivileged(SharedClassObject.java:641) at org.openide.util.SharedClassObject$SetAccessibleAction.run(SharedClassObject.java:1001) at org.openide.util.SharedClassObject$SetAccessibleAction.run(SharedClassObject.java:993) at java.security.AccessController.doPrivileged(Native Method) at org.openide.util.SharedClassObject.findObject(SharedClassObject.java:515) at org.netbeans.modules.uihandler.EarlyHandler.publish(EarlyHandler.java:68) at org.netbeans.core.startup.TopLogging$LookupDel.publish(TopLogging.java:798) at java.util.logging.Logger.log(Logger.java:458) at org.netbeans.modules.project.ui.OpenProjectList.log(OpenProjectList.java:1713) at org.netbeans.modules.project.ui.OpenProjectList.access$1000(OpenProjectList.java:124) at org.netbeans.modules.project.ui.OpenProjectList$LoadOpenProjects.loadOnBackground(OpenProjectList.java:374) at org.netbeans.modules.project.ui.OpenProjectList$LoadOpenProjects.run(OpenProjectList.java:274) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572) [catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997) Thanks, Nitin Rajora
Created attachment 84110 [details] Contains stacktrace for Exception - NoClassDefFoundError, in NetbeansIDE6.5.1, posted on - 29June2009
*** This issue has been marked as a duplicate of 164580 ***
Workaround is to delete file $USERDIR/config/Preferences/org/netbeans/modules/uihandler.properties