any recommendations?

Hello,

Somewhere in my code I have a bug that I can't reliably reproduce. It occurs randomly when I'm deleting entries from a JList (I retrieve certain pieces of info from the entry before deleting it, then I delete it and the JList contents are then refreshed so remaining items are re-added to the JList). The only output I get when the exception occurs is the following:

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 1 >= 0
at java.util.Vector.elementAt(Unknown Source)
at javax.swing.DefaultListModel.getElementAt(Unknown Source)
at javax.swing.plaf.basic.BasicListUI.paintCell(Unknown Source)
at javax.swing.plaf.basic.BasicListUI.paint(Unknown Source)
at javax.swing.plaf.ComponentUI.update(Unknown Source)
at javax.swing.JComponent.paintComponent(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintWithOffscreenBuffer(Unknown Source)
at javax.swing.JComponent.paintDoubleBuffered(Unknown Source)
at javax.swing.JComponent._paintImmediately(Unknown Source)
at javax.swing.JComponent.paintImmediately(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)


The "1" as the index value differs between exception printouts. I don't know where that index value is originating from or what Vector is really having its elements retrieved. The index value doesn't correspond to the index of the Object that I'm selecting for deletion. I've placed try/catches throughout the places where I thought was causing the exception to print out a stacktrace that I hoped would include a line number but I'm not getting any extra output. I also would put in a print statement so I knew which try/catch was being executed but I don't see that outputted either.

When the JList is refreshed it is done so through a thread. I've tried to use run() to make the thread do its work but not in a thread and I don't get the exception but since I can't reproduce it reliably I don't know if it's really a threading problem or not. Using Eclipse's debugger also doesn't help so far because I can't get the error to occur during the debugging, at least not yet.

Is there anything else I can try that can give me more information as to what line in my code this is occurring on so I can begin to fix it?

thanks
.

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