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java.lang.ArrayIndexOutOfBoundsException: 2 >= 2 at java.util.Vector.elementAt(Vector.java:417) at javax.swing.tree.DefaultMutableTreeNode.getChildAt(DefaultMutableTreeNode.java:231) at javax.swing.tree.DefaultTreeModel.getChild(DefaultTreeModel.java:151) at NodeHandler.treeCollapsed(NodeHandler.java:62) at javax.swing.JTree.fireTreeCollapsed(JTree.java:2156) at javax.swing.JTree.setExpandedState(JTree.java:2770) at javax.swing.JTree.collapsePath(JTree.java:1671) at javax.swing.plaf.basic.BasicTreeUI.toggleExpandState(BasicTreeUI.java:2033) at javax.swing.plaf.basic.BasicTreeUI.handleExpandControlClick(BasicTreeUI.java:2009) at javax.swing.plaf.basic.BasicTreeUI.checkForClickInExpandControl(BasicTreeUI.java:1963) at javax.swing.plaf.basic.BasicTreeUI$MouseHandler.mousePressed(BasicTreeUI.java:2674) at java.awt.Component.processMouseEvent(Component.java:3714) at java.awt.Component.processEvent(Component.java:3546) at java.awt.Container.processEvent(Container.java:1164) at java.awt.Component.dispatchEventImpl(Component.java:2595) at java.awt.Container.dispatchEventImpl(Container.java:1213) at java.awt.Component.dispatchEvent(Component.java:2499) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:2451) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:2210)