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java.lang.IllegalArgumentException: Cannot format given Object as a Number	at java.text.DecimalFormat.format(DecimalFormat.java:487)	at java.text.Format.format(Format.java:140)	at javax.swing.JTable$DoubleRenderer.setValue(JTable.java:5315)	at javax.swing.table.DefaultTableCellRenderer.getTableCellRendererComponent(DefaultTableCellRenderer.java:223)	at javax.swing.JTable.prepareRenderer(JTable.java:5683)	at javax.swing.plaf.basic.BasicTableUI.paintCell(BasicTableUI.java:2067)	at javax.swing.plaf.basic.BasicTableUI.paintCells(BasicTableUI.java:1969)	at javax.swing.plaf.basic.BasicTableUI.paint(BasicTableUI.java:1765)	at javax.swing.plaf.ComponentUI.update(ComponentUI.java:143)	at javax.swing.JComponent.paintComponent(JComponent.java:758)	at javax.swing.JComponent.paint(JComponent.java:1022)	at javax.swing.JComponent.paintChildren(JComponent.java:859)	at javax.swing.JComponent.paint(JComponent.java:1031)	at javax.swing.JViewport.paint(JViewport.java:747)	at javax.swing.JComponent.paintChildren(JComponent.java:859)	at javax.swing.JComponent.paint(JComponent.java:1031)	at javax.swing.JComponent.paintToOffscreen(JComponent.java:5104)	at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:285)	at javax.swing.RepaintManager.paint(RepaintManager.java:1132)	at javax.swing.JComponent._paintImmediately(JComponent.java:5052)	at javax.swing.JComponent.paintImmediately(JComponent.java:4862)	at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:727)	at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:683)	at javax.swing.RepaintManager.seqPaintDirtyRegions(RepaintManager.java:663)	at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:128)	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.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)