java.lang.NullPointerException
   at sun.java2d.SunGraphics2D.getClipBounds(SunGraphics2D.java:1752)
   at org.netbeans.api.visual.widget.Widget.paint(Widget.java:1414)
   at org.netbeans.api.visual.widget.Widget.paintChildren(Widget.java:1480)
   at org.netbeans.api.visual.widget.Widget.paint(Widget.java:1426)
   at org.netbeans.api.visual.widget.Widget.paintChildren(Widget.java:1480)
   at org.netbeans.api.visual.widget.Widget.paint(Widget.java:1426)
   at org.netbeans.api.visual.widget.Widget.paintChildren(Widget.java:1480)
   at org.netbeans.api.visual.widget.Widget.paint(Widget.java:1426)
   at org.netbeans.api.visual.widget.Widget.paintChildren(Widget.java:1480)
   at org.netbeans.api.visual.widget.Widget.paint(Widget.java:1426)
   at org.netbeans.api.visual.widget.Widget.paintChildren(Widget.java:1480)
   at org.netbeans.api.visual.widget.Widget.paint(Widget.java:1426)
   at org.netbeans.api.visual.widget.Widget.paintChildren(Widget.java:1480)
   at org.netbeans.modules.graphicclassview.JavaScene.paintChildren(JavaScene.java:183)
   at org.netbeans.api.visual.widget.Widget.paint(Widget.java:1426)
   at org.netbeans.api.visual.widget.SceneComponent.paint(SceneComponent.java:140)
   at javax.swing.JComponent.paintChildren(JComponent.java:887)
   at javax.swing.JComponent.paint(JComponent.java:1063)
   at javax.swing.JViewport.paint(JViewport.java:731)
   at javax.swing.JComponent.paintChildren(JComponent.java:887)
   at javax.swing.JComponent.paint(JComponent.java:1063)
   at javax.swing.JComponent.paintChildren(JComponent.java:887)
   at javax.swing.JComponent.paint(JComponent.java:1063)
   at javax.swing.JComponent.paintChildren(JComponent.java:887)
   at javax.swing.JComponent.paint(JComponent.java:1063)
   at javax.swing.JComponent.paintChildren(JComponent.java:887)
   at javax.swing.JComponent.paint(JComponent.java:1063)
   at org.netbeans.swing.tabcontrol.TabbedContainer.paint(TabbedContainer.java:973)
   at javax.swing.JComponent.paintChildren(JComponent.java:887)
   at javax.swing.JComponent.paint(JComponent.java:1063)
   at javax.swing.JComponent.paintToOffscreen(JComponent.java:5221)
   at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1482)
   at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1413)
   at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:311)
   at javax.swing.RepaintManager.paint(RepaintManager.java:1206)
   at javax.swing.JComponent._paintImmediately(JComponent.java:5169)
   at javax.swing.JComponent.paintImmediately(JComponent.java:4980)
   at javax.swing.JComponent.paintImmediately(JComponent.java:4961)
   at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:770)
   at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:728)
   at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:677)
   at javax.swing.RepaintManager.access$700(RepaintManager.java:59)
   at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1621)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:701)
   at java.awt.EventQueue.access$000(EventQueue.java:102)
   at java.awt.EventQueue$3.run(EventQueue.java:662)
   at java.awt.EventQueue$3.run(EventQueue.java:660)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:671)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)