Hello Beccari, It would be helpful if we could create a unit test that reproduces this error.
Are you adding activities from a thread other than the AWT event thread? michael On Fri, Dec 16, 2011 at 10:31 AM, beccari.francesco <beccari.france...@gmail.com> wrote: > Sometimes, when i run my application, I have this exception and all > the activities terminate. > This happens when there are many activities at the same time. > > Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException > at > edu.umd.cs.piccolo.activities.PActivityScheduler.getAnimating(PActivityScheduler.java: > 191) > at edu.umd.cs.piccolo.PCanvas.getAnimating(PCanvas.java:353) > at edu.umd.cs.piccolo.PCanvas.paintComponent(PCanvas.java:589) > at javax.swing.JComponent.paint(JComponent.java:1029) > at javax.swing.JComponent.paintToOffscreen(JComponent.java:5124) > at javax.swing.RepaintManager > $PaintManager.paintDoubleBuffered(RepaintManager.java:1479) > at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java: > 1410) > at javax.swing.RepaintManager.paint(RepaintManager.java:1224) > at javax.swing.JComponent._paintImmediately(JComponent.java:5072) > at javax.swing.JComponent.paintImmediately(JComponent.java:4882) > at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java: > 785) > at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java: > 713) > at > javax.swing.RepaintManager.seqPaintDirtyRegions(RepaintManager.java: > 693) > at javax.swing.SystemEventQueueUtilities > $ComponentWorkRequest.run(SystemEventQueueUtilities.java:125) > at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) > at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:641) > at java.awt.EventQueue.access$000(EventQueue.java:84) > at java.awt.EventQueue$1.run(EventQueue.java:602) > at java.awt.EventQueue$1.run(EventQueue.java:600) > at java.security.AccessController.doPrivileged(Native Method) > at java.security.AccessControlContext > $1.doIntersectionPrivilege(AccessControlContext.java:87) > at java.awt.EventQueue.dispatchEvent(EventQueue.java:611) > at > java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java: > 269) > at > java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java: > 184) > at > java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java: > 174) > at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java: > 169) > at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java: > 161) > at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) > Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException > at > edu.umd.cs.piccolo.activities.PActivityScheduler.processActivities(PActivityScheduler.java: > 175) > at edu.umd.cs.piccolo.PRoot.processInputs(PRoot.java:332) > at edu.umd.cs.piccolo.activities.PActivityScheduler > $1.actionPerformed(PActivityScheduler.java:222) > at javax.swing.Timer.fireActionPerformed(Timer.java:291) > at javax.swing.Timer$DoPostEvent.run(Timer.java:221) > at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) > at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:641) > at java.awt.EventQueue.access$000(EventQueue.java:84) > at java.awt.EventQueue$1.run(EventQueue.java:602) > at java.awt.EventQueue$1.run(EventQueue.java:600) > at java.security.AccessController.doPrivileged(Native Method) > at java.security.AccessControlContext > $1.doIntersectionPrivilege(AccessControlContext.java:87) > at java.awt.EventQueue.dispatchEvent(EventQueue.java:611) > at > java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java: > 269) > at > java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java: > 184) > at > java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java: > 174) > at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java: > 169) > at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java: > 161) > at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) > > -- > Piccolo2D Developers Group: http://groups.google.com/group/piccolo2d-dev?hl=en -- Piccolo2D Developers Group: http://groups.google.com/group/piccolo2d-dev?hl=en
