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java.lang.ClassCastException: java.lang.String at TraceEndpointsTree$MyTerminalEndpointsRenderer.getTreeCellRendererComponent(TraceEndpointsTree.java:544) at javax.swing.plaf.basic.BasicTreeUI$NodeDimensionsHandler.getNodeDimensions(BasicTreeUI.java:2501) at javax.swing.tree.AbstractLayoutCache.getNodeDimensions(AbstractLayoutCache.java:402) at javax.swing.tree.VariableHeightLayoutCache$TreeStateNode.updatePreferredSize(VariableHeightLayoutCache.java:1289) at javax.swing.tree.VariableHeightLayoutCache$TreeStateNode.getPreferredWidth(VariableHeightLayoutCache.java:1106) at javax.swing.tree.VariableHeightLayoutCache.getMaxNodeWidth(VariableHeightLayoutCache.java:937) at javax.swing.tree.VariableHeightLayoutCache.getPreferredWidth(VariableHeightLayoutCache.java:259) at javax.swing.plaf.basic.BasicTreeUI.updateCachedPreferredSize(BasicTreeUI.java:1585) at javax.swing.plaf.basic.BasicTreeUI.getPreferredSize(BasicTreeUI.java:1680) at javax.swing.plaf.basic.BasicTreeUI.getPreferredSize(BasicTreeUI.java:1668) at javax.swing.JComponent.getPreferredSize(JComponent.java:796) at javax.swing.ScrollPaneLayout.layoutContainer(ScrollPaneLayout.java:745) at java.awt.Container.layout(Container.java:494) at java.awt.Container.doLayout(Container.java:484) at java.awt.Container.validateTree(Container.java:553) at java.awt.Container.validateTree(Container.java:560) at java.awt.Container.validateTree(Container.java:560) at java.awt.Container.validateTree(Container.java:560) at java.awt.Container.validateTree(Container.java:560) at java.awt.Container.validateTree(Container.java:560) at java.awt.Container.validateTree(Container.java:560) at java.awt.Container.validate(Container.java:535) at java.awt.Window.pack(Window.java:267) at TraceEndpointsTree.<init>(TraceEndpointsTree.java:171) at ClientFrame.treeDoubleClick(ClientFrame.java:635) at ClientFrame.access$3(ClientFrame.java:549) at ClientFrame$SymMouseAction.mouseClicked(ClientFrame.java:449) at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:211) at java.awt.Component.processMouseEvent(Component.java:3163) at java.awt.Component.processEvent(Component.java:2999) at java.awt.Container.processEvent(Container.java:990) at java.awt.Component.dispatchEventImpl(Component.java:2394) at java.awt.Container.dispatchEventImpl(Container.java:1035) at java.awt.Component.dispatchEvent(Component.java:2307) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:2043) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:1841) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:1730) at java.awt.Container.dispatchEventImpl(Container.java:1022) at java.awt.Window.dispatchEventImpl(Window.java:749) at java.awt.Component.dispatchEvent(Component.java:2307) at java.awt.EventQueue.dispatchEvent(EventQueue.java:287) at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:92) at java.awt.EventDispatchThread.run(EventDispatchThread.java:83)