java.lang.NullPointerException

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    • java.lang.NullPointerException at javax.swing.plaf.basic.BasicListUI.paintCell(BasicListUI.java:133) at javax.swing.plaf.basic.BasicListUI.paint(BasicListUI.java:215) at javax.swing.plaf.ComponentUI.update(ComponentUI.java:142) at javax.swing.JComponent.paintComponent(JComponent.java:541) at javax.swing.JComponent.paint(JComponent.java:808) at javax.swing.JComponent.paintWithOffscreenBuffer(JComponent.java:4787) at javax.swing.JComponent.paintDoubleBuffered(JComponent.java:4740) at javax.swing.JComponent._paintImmediately(JComponent.java:4685) at javax.swing.JComponent.paintImmediately(JComponent.java:4488) at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:410) at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:117) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178) at java.awt.EventQueue.dispatchEvent(EventQueue.java:454) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137) at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)

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