java.lang.NullPointerException

Stack Overflow | user3625654 | 9 months ago
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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at org.apache.xerces.dom.CoreDocumentImpl.insertBefore()
    2. Xerces2-j
      NodeImpl.appendChild
      1. org.apache.xerces.dom.CoreDocumentImpl.insertBefore(Unknown Source)
      2. org.apache.xerces.dom.NodeImpl.appendChild(Unknown Source)
      2 frames
    3. Unknown
      RefactoredXMLEditor$myActionListener.actionPerformed
      1. XMLTree.update(XMLTree.java:201)
      2. RefactoredXMLEditor$myActionListener.actionPerformed(RefactoredXMLEditor.java:537)
      2 frames
    4. Java RT
      EventDispatchThread.run
      1. javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
      2. javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
      3. javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
      4. javax.swing.DefaultButtonModel.setPressed(Unknown Source)
      5. javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
      6. java.awt.Component.processMouseEvent(Unknown Source)
      7. javax.swing.JComponent.processMouseEvent(Unknown Source)
      8. java.awt.Component.processEvent(Unknown Source)
      9. java.awt.Container.processEvent(Unknown Source)
      10. java.awt.Component.dispatchEventImpl(Unknown Source)
      11. java.awt.Container.dispatchEventImpl(Unknown Source)
      12. java.awt.Component.dispatchEvent(Unknown Source)
      13. java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
      14. java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
      15. java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
      16. java.awt.Container.dispatchEventImpl(Unknown Source)
      17. java.awt.Component.dispatchEvent(Unknown Source)
      18. java.awt.EventQueue.dispatchEventImpl(Unknown Source)
      19. java.awt.EventQueue.access$300(Unknown Source)
      20. java.awt.EventQueue$3.run(Unknown Source)
      21. java.awt.EventQueue$3.run(Unknown Source)
      22. java.security.AccessController.doPrivileged(Native Method)
      23. java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
      24. java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
      25. java.awt.EventQueue$4.run(Unknown Source)
      26. java.awt.EventQueue$4.run(Unknown Source)
      27. java.security.AccessController.doPrivileged(Native Method)
      28. java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
      29. java.awt.EventQueue.dispatchEvent(Unknown Source)
      30. java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
      31. java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
      32. java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
      33. java.awt.EventDispatchThread.pumpEvents(Unknown Source)
      34. java.awt.EventDispatchThread.pumpEvents(Unknown Source)
      35. java.awt.EventDispatchThread.run(Unknown Source)
      35 frames