Exception occured in JTree refresh

Question

I have constructed a tree and when ever any change occured to the tree i am sending an event from server which will notify all the clients.
Then the tree is refreshed by using TreeModelEvent methods like nodeInserted, nodesRemoved, nodesModified etc.
The no of events generated are so many that if there are 20 nodes then for each second say for each node there will be 10 updates.
At this time i am getting exception saying
java.lang.ArrayIndexOutOfBoundsException: 0 >= 0
at java.util.Vector.elementAt(Vector.java:431)
at javax.swing.tree.DefaultMutableTreeNode.getChildAt(DefaultMutableTreeNode.java:230)
at javax.swing.tree.VariableHeightLayoutCache$VisibleTreeStateNodeEnumeration.updateNextIndex(VariableHeightLayoutCache.java:1739)
at javax.swing.tree.VariableHeightLayoutCache$VisibleTreeStateNodeEnumeration.updateNextObject(VariableHeightLayoutCache.java:1690)
at javax.swing.tree.VariableHeightLayoutCache$VisibleTreeStateNodeEnumeration.nextElement(VariableHeightLayoutCache.java:1681)
at javax.swing.plaf.basic.BasicTreeUI.paint(BasicTreeUI.java:1121)
at javax.swing.plaf.metal.MetalTreeUI.paint(MetalTreeUI.java:152)
at javax.swing.plaf.ComponentUI.update(ComponentUI.java:142)
at javax.swing.JComponent.paintComponent(JComponent.java:541)
at javax.swing.JComponent.paint(JComponent.java:808)
at javax.swing.JComponent.paintWithOffscreenBuffer(JComponent.java:4787)
at javax.swing.JComponent.paintDoubleBuffered(JComponent.java:4740)
at javax.swing.JComponent._paintImmediately(JComponent.java:4685)
at javax.swing.JComponent.paintImmediately(JComponent.java:4488)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:410)
at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:117)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:454)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)
This is a big problem for me and i have to fix it as early as possible.
Thanks in advance

Answer 1

Hai ->some array index out of bound exception!???!!!????
Check the size of the array u r using- r u using any vector-check that area u may try to use more than what number of components in ths array.
Can you post a runnable code with similar problem!
so you can get your problem solved as early as possible!