Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at javax.swing.plaf.basic.BasicScrollPaneUI.paint(BasicScrollPaneUI.java:90)
	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.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)