AppletTalk.com Java discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Null pointer exception while trying to repaint the component          AppletTalk.com Forum Index -> Java GUI Toolkits View previous topic :: View next topic   Author Message Lightning McQueen Guest Posted: Tue May 01, 2007 7:10 am    Post subject: Null pointer exception while trying to repaint the component I am trying to repaint a component that displays a buffered image when the component is scrolled. I get the following error: [java] java.lang.NullPointerException: NullSD does not handle this operation [java] at sun.java2d.NullSurfaceData.getRaster(Unknown Source) [java] at sun.java2d.loops.OpaqueCopyAnyToArgb.Blit(Unknown Source) [java] at sun.java2d.loops.GraphicsPrimitive.convertFrom(Unknown Source) [java] at sun.java2d.loops.MaskBlit$General.MaskBlit(Unknown Source) [java] at sun.java2d.loops.Blit$GeneralMaskBlit.Blit(Unknown Source) [java] at sun.java2d.pipe.AlphaPaintPipe.renderPathTile(Unknown Source) [java] at sun.java2d.pipe.SpanShapeRenderer $Composite.renderBox(Unknown Source) [java] at sun.java2d.pipe.SpanShapeRenderer.spanClipLoop(Unknown Source) [java] at sun.java2d.pipe.SpanShapeRenderer.renderSpans(Unknown Source) [java] at sun.java2d.pipe.SpanShapeRenderer.renderPath(Unknown Source) [java] at sun.java2d.pipe.SpanShapeRenderer.fill(Unknown Source) [java] at sun.java2d.pipe.ValidatePipe.fill(Unknown Source) [java] at sun.java2d.SunGraphics2D.fill(Unknown Source) [java] at i3dea.ditto.DocumentImageDisplay.paintZone(DocumentImageDisplay.java: 256) [java] at i3dea.ditto.DocumentImageDisplay.paintComponent(DocumentImageDisplay.java: 467) [java] at javax.swing.JComponent.paint(Unknown Source) [java] at javax.swing.JComponent.paintChildren(Unknown Source) [java] at javax.swing.JComponent.paint(Unknown Source) [java] at javax.swing.JViewport.paint(Unknown Source) [java] at javax.swing.JComponent.paintChildren(Unknown Source) [java] at javax.swing.JComponent.paint(Unknown Source) [java] at javax.swing.JComponent.paintWithOffscreenBuffer(Unknown Source) [java] at javax.swing.JComponent.paintDoubleBuffered(Unknown Source) [java] at javax.swing.JComponent._paintImmediately(Unknown Source) [java] at javax.swing.JComponent.paintImmediately(Unknown Source) [java] at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source) [java] at javax.swing.SystemEventQueueUtilities $ComponentWorkRequest.run(Unknown Source) [java] at java.awt.event.InvocationEvent.dispatch(Unknown Source) [java] at java.awt.EventQueue.dispatchEvent(Unknown Source) [java] at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source) [java] at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) [java] at java.awt.EventDispatchThread.pumpEvents(Unknown Source) [java] at java.awt.EventDispatchThread.pumpEvents(Unknown Source) [java] at java.awt.EventDispatchThread.run(Unknown Source) Thanks Mangai Back to top Daniel Pitts Guest Posted: Tue May 01, 2007 8:32 pm    Post subject: Re: Null pointer exception while trying to repaint the compo On Apr 30, 10:48 pm, Lightning McQueen <mangaise...@gmail.com> wrote: Quote: I am trying to repaint a component that displays a buffered image when the component is scrolled. I get the following error: [java] java.lang.NullPointerException: NullSD does not handle this operation [java] at sun.java2d.NullSurfaceData.getRaster(Unknown Source) [java] at sun.java2d.loops.OpaqueCopyAnyToArgb.Blit(Unknown Source) [java] at sun.java2d.loops.GraphicsPrimitive.convertFrom(Unknown Source) [java] at sun.java2d.loops.MaskBlit$General.MaskBlit(Unknown Source) [java] at sun.java2d.loops.Blit$GeneralMaskBlit.Blit(Unknown Source) [java] at sun.java2d.pipe.AlphaPaintPipe.renderPathTile(Unknown Source) [java] at sun.java2d.pipe.SpanShapeRenderer $Composite.renderBox(Unknown Source) [java] at sun.java2d.pipe.SpanShapeRenderer.spanClipLoop(Unknown Source) [java] at sun.java2d.pipe.SpanShapeRenderer.renderSpans(Unknown Source) [java] at sun.java2d.pipe.SpanShapeRenderer.renderPath(Unknown Source) [java] at sun.java2d.pipe.SpanShapeRenderer.fill(Unknown Source) [java] at sun.java2d.pipe.ValidatePipe.fill(Unknown Source) [java] at sun.java2d.SunGraphics2D.fill(Unknown Source) [java] at i3dea.ditto.DocumentImageDisplay.paintZone(DocumentImageDisplay.java: 256) [java] at i3dea.ditto.DocumentImageDisplay.paintComponent(DocumentImageDisplay.java: 467) [java] at javax.swing.JComponent.paint(Unknown Source) [java] at javax.swing.JComponent.paintChildren(Unknown Source) [java] at javax.swing.JComponent.paint(Unknown Source) [java] at javax.swing.JViewport.paint(Unknown Source) [java] at javax.swing.JComponent.paintChildren(Unknown Source) [java] at javax.swing.JComponent.paint(Unknown Source) [java] at javax.swing.JComponent.paintWithOffscreenBuffer(Unknown Source) [java] at javax.swing.JComponent.paintDoubleBuffered(Unknown Source) [java] at javax.swing.JComponent._paintImmediately(Unknown Source) [java] at javax.swing.JComponent.paintImmediately(Unknown Source) [java] at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source) [java] at javax.swing.SystemEventQueueUtilities $ComponentWorkRequest.run(Unknown Source) [java] at java.awt.event.InvocationEvent.dispatch(Unknown Source) [java] at java.awt.EventQueue.dispatchEvent(Unknown Source) [java] at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source) [java] at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) [java] at java.awt.EventDispatchThread.pumpEvents(Unknown Source) [java] at java.awt.EventDispatchThread.pumpEvents(Unknown Source) [java] at java.awt.EventDispatchThread.run(Unknown Source) Thanks Mangai I think that JScrollPane does this automatically for you. 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