java.lang.NoClassDefFoundError: Could not initialize class java.awt.dnd.DragSource
   at org.openide.explorer.view.ExplorerDragSupport.getDefaultGestureRecognizer(ExplorerDragSupport.java:241)
   at org.openide.explorer.view.ExplorerDragSupport.activate(ExplorerDragSupport.java:217)
   at org.openide.explorer.view.TreeView.setDragSource(TreeView.java:504)
   at org.netbeans.modules.project.ui.ProjectTab.<init>(ProjectTab.java:202)
   at org.netbeans.modules.project.ui.ProjectTab.<init>(ProjectTab.java:182)
   at org.netbeans.modules.project.ui.ProjectTab.getDefault(ProjectTab.java:332)
   at org.netbeans.modules.project.ui.ProjectTab.findDefault(ProjectTab.java:318)
   at org.netbeans.modules.project.ui.ProjectUtilities$2.run(ProjectUtilities.java:244)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:744)
   at java.awt.EventQueue.access$400(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:697)
   at java.awt.EventQueue$3.run(EventQueue.java:691)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:714)
   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)