A Random ArrayIndexOutOfBoundsException while launching an application

Question

Hi,
I have a swing application which has only one tree and no threads. I get an exception on starting the application when the tree is drawn. This exception is not coming regularly, hence we are not able to create an exact debug scenario.
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException
2 >= 0
        at java.util.Vector.elementAt(Vector.java:427)
        at javax.swing.tree.VariableHeightLayoutCache.getNode(VariableHeightLay
utCache.java:976)
        at javax.swing.tree.VariableHeightLayoutCache.getMaxNodeWidth(VariableH
ightLayoutCache.java:989)
        at javax.swing.tree.VariableHeightLayoutCache.getPreferredWidth(Variabl
HeightLayoutCache.java:291)
        at javax.swing.plaf.basic.BasicTreeUI.updateCachedPreferredSize(BasicTr
eUI.java:1828)
        at javax.swing.plaf.basic.BasicTreeUI.getPreferredSize(BasicTreeUI.java
1926)
        at javax.swing.plaf.basic.BasicTreeUI.getPreferredSize(BasicTreeUI.java
1914)
        at javax.swing.JComponent.getPreferredSize(JComponent.java:1632)
        at javax.swing.JViewport.getViewSize(JViewport.java:1018)
        at javax.swing.plaf.basic.BasicScrollPaneUI.syncScrollPaneWithViewport(
asicScrollPaneUI.java:265)
        at javax.swing.plaf.basic.BasicScrollPaneUI$Handler.viewportStateChange
(BasicScrollPaneUI.java:1064)
        at javax.swing.plaf.basic.BasicScrollPaneUI$Handler.stateChanged(BasicS
rollPaneUI.java:1006)
        at javax.swing.JViewport.fireStateChanged(JViewport.java:1384)
        at javax.swing.JViewport$ViewListener.componentResized(JViewport.java:1
02)
        at java.awt.Component.processComponentEvent(Component.java:5867)
        at java.awt.Component.processEvent(Component.java:5821)
        at java.awt.Container.processEvent(Container.java:2058)
        at java.awt.Component.dispatchEventImpl(Component.java:4413)
        at java.awt.Container.dispatchEventImpl(Container.java:2116)
        at java.awt.Component.dispatchEvent(Component.java:4243)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThr
ad.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread
java:183)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThr
ad.java:173)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)Thank you very much your inputs and suggestions.

Answer 1

When you encounter that type of error, try using SwingUtilities - invokeLater() method instead of using a Thread object.
          SwingUtilities.invokeLater(new Runnable(){
               public void run(){
                    //Your code here
          });