JTree调用updateUI方法时候报错

当JTree或者JTreeTable调用updateUI方法是会报空指针异常如下所示：

ERROR: 16:39:29,337  - TcLogger$IC_UncaughtExceptionHandler.uncaughtException:?
java.lang.NullPointerException
java.lang.NullPointerException
 at javax.swing.plaf.basic.BasicTableUI.paintCell(BasicTableUI.java:2106)
 at javax.swing.plaf.basic.BasicTableUI.paintCells(BasicTableUI.java:2016)
 at javax.swing.plaf.basic.BasicTableUI.paint(BasicTableUI.java:1812)
 at javax.swing.plaf.ComponentUI.update(ComponentUI.java:161)
 at javax.swing.JComponent.paintComponent(JComponent.java:779)
 at javax.swing.JComponent.paint(JComponent.java:1055)
 at javax.swing.JComponent.paintToOffscreen(JComponent.java:5232)
 at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1529)
 at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1452)
 at javax.swing.RepaintManager.paint(RepaintManager.java:1249)
 at javax.swing.JComponent._paintImmediately(JComponent.java:5180)
 at javax.swing.JComponent.paintImmediately(JComponent.java:4991)
 at javax.swing.RepaintManager$3.run(RepaintManager.java:808)
 at javax.swing.RepaintManager$3.run(RepaintManager.java:796)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
 at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:796)
 at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:769)
 at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:718)
 at javax.swing.RepaintManager.access$1100(RepaintManager.java:62)
 at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1677)
 at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:312)
 at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:738)
 at java.awt.EventQueue.access$300(EventQueue.java:103)
 at java.awt.EventQueue$3.run(EventQueue.java:699)
 at java.awt.EventQueue$3.run(EventQueue.java:697)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
 at java.awt.EventQueue.dispatchEvent(EventQueue.java:708)
 at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
 at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
 at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:154)
 at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:182)
 at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:312)
 at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:738)
 at java.awt.EventQueue.access$300(EventQueue.java:103)
 at java.awt.EventQueue$3.run(EventQueue.java:699)
 at java.awt.EventQueue$3.run(EventQueue.java:697)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
 at java.awt.EventQueue.dispatchEvent(EventQueue.java:708)
 at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
 at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
 at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
 at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
 at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)

 at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
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原文链接：https://blog.csdn.net/qq_36880602/article/details/80498443

　　解决办法：不能直接调用updateUI方法，需要放到SwingUtilities.invokeLater中执行；

SwingUtilities.invokeLater(new Runnable() {
     public void run() {
         jtree.updateUI();
     }
 });