Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at javax.swing.plaf.basic.BasicTableUI.paintCells(BasicTableUI.java:1968)
	at javax.swing.plaf.basic.BasicTableUI.paint(BasicTableUI.java:1897)
	at javax.swing.plaf.ComponentUI.update(ComponentUI.java:142)
	at javax.swing.JComponent.paintComponent(JComponent.java:742)
	at javax.swing.JComponent.paint(JComponent.java:1005)
	at javax.swing.JComponent.paintWithOffscreenBuffer(JComponent.java:4963)
	at javax.swing.JComponent.paintDoubleBuffered(JComponent.java:4916)
	at javax.swing.JComponent._paintImmediately(JComponent.java:4859)
	at javax.swing.JComponent.paintImmediately(JComponent.java:4666)
	at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:451)
	at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:114)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)