Hi!
I’ve some issues with my first application:
I created a new project with a new basicGame. I didn’t change anything on this code but in the section output - application i’ve found this error:
java.lang.NoClassDefFoundError: com/sun/tools/javac/code/Symbol
at org.netbeans.api.java.source.ui.ScanDialog.runWhenScanFinished(ScanDialog.java:85)
at org.netbeans.modules.java.api.common.project.BaseActionProvider.invokeAction(BaseActionProvider.java:671)
at org.netbeans.spi.project.support.LookupProviderSupport$MergedActionProvider.invokeAction(LookupProviderSupport.java:287)
at org.netbeans.modules.project.ui.actions.ProjectAction$2.run(ProjectAction.java:187)
at org.netbeans.modules.openide.util.NbMutexEventProvider$Event.doEvent(NbMutexEventProvider.java:118)
at org.netbeans.modules.openide.util.NbMutexEventProvider$Event.writeAccess(NbMutexEventProvider.java:83)
at org.netbeans.modules.openide.util.LazyMutexImplementation.writeAccess(LazyMutexImplementation.java:79)
at org.openide.util.Mutex.writeAccess(Mutex.java:310)
at org.netbeans.modules.project.ui.actions.ProjectAction.runSequentially(ProjectAction.java:184)
at org.netbeans.modules.project.ui.actions.MainProjectAction$1$1.run(MainProjectAction.java:140)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Caused by: java.lang.ClassNotFoundException: com.sun.tools.javac.code.Symbol starting from ModuleCL@813fd7[org.netbeans.modules.java.source.base] with possible defining loaders null and declared parents [ModuleCL@15d987b[org.netbeans.modules.classfile], ModuleCL@574c6a[org.netbeans.modules.editor.mimelookup], ModuleCL@1d9c087[org.netbeans.api.java], org.netbeans.MainImpl$BootClassLoader@817b38, ModuleCL@1c6e816[org.netbeans.api.progress], ModuleCL@fdb7f[org.netbeans.lib.nbjavac], ModuleCL@1834105[org.netbeans.libs.javacapi], ModuleCL@95d42f[org.netbeans.modules.editor.settings], ModuleCL@67db23[org.netbeans.libs.lucene], ModuleCL@14afe6e[org.netbeans.modules.lexer], ...17 more]
at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:228)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 25 more
I’m so confused 
I think there’s a problem with DOT symbol in java, but java is correctly installed on my machine and I use regularly Eclipse and i’ve not issues on this IDE.
I’ve tried to uninstall and reinstall jme (thinking that there were some truble with the installation) but the problem is still here. I don’t know what to do or what to think 
Thanks to everyone will reply! 