摘要：
最近在做东西时发现，当在线程里面刷新JTree时，有时会出现空指针错误，在网上查了很久，终于发现以下解决方法：JTree中调用UpdateUI()报以下错误java.lang.NullPointerException at javax.swing.plaf.basic.BasicTreeUI.paintRow(BasicTreeUI.java:1367) at javax.swing.plaf.basic.BasicTreeUI.paint(BasicTreeUI.java:1171) at javax.swing.plaf.metal.MetalTreeUI.paint(MetalTreeU 阅读全文
