java.lang.NullPointerException

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    • java.lang.NullPointerException at javax.swing.plaf.basic.BasicListUI.paintImpl(BasicListUI.java:248) at javax.swing.plaf.basic.BasicListUI.paint(BasicListUI.java:222) at javax.swing.plaf.ComponentUI.update(ComponentUI.java:153) at javax.swing.JComponent.paintComponent(JComponent.java:752) at javax.swing.JComponent.paint(JComponent.java:1029) at javax.swing.JComponent._paintImmediately(JComponent.java:5098) at javax.swing.JComponent.paintImmediately(JComponent.java:4882) at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:811) at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:713) at javax.swing.RepaintManager.seqPaintDirtyRegions(RepaintManager.java:693) at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:125) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) at java.awt.EventQueue.dispatchEvent(EventQueue.java:633) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

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