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Root Cause Analysis

  1. java.lang.NullPointerException

    No message provided

    at javax.swing.plaf.basic.BasicListUI$ListDropTargetListener.updateInsertionLocation()
  2. Java RT
    EventDispatchThread.run
    1. javax.swing.plaf.basic.BasicListUI$ListDropTargetListener.updateInsertionLocation(BasicListUI.java:2241)
    2. javax.swing.plaf.basic.BasicDropTargetListener.dragOver(BasicDropTargetListener.java:230)
    3. javax.swing.TransferHandler$SwingDropTarget.dragOver(TransferHandler.java:567)
    4. sun.awt.dnd.SunDropTargetContextPeer.processMotionMessage(SunDropTargetContextPeer.java:484)
    5. sun.awt.dnd.SunDropTargetContextPeer.access$600(SunDropTargetContextPeer.java:52)
    6. sun.awt.dnd.SunDropTargetContextPeer$EventDispatcher.dispatchMotionEvent(SunDropTargetContextPeer.java:781)
    7. sun.awt.dnd.SunDropTargetContextPeer$EventDispatcher.dispatchEvent(SunDropTargetContextPeer.java:738)
    8. sun.awt.dnd.SunDropTargetEvent.dispatch(SunDropTargetEvent.java:29)
    9. java.awt.Component.dispatchEventImpl(Component.java:3456)
    10. java.awt.Container.dispatchEventImpl(Container.java:1623)
    11. java.awt.Component.dispatchEvent(Component.java:3439)
    12. java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3450)
    13. java.awt.LightweightDispatcher.processDropTargetEvent(Container.java:3236)
    14. java.awt.LightweightDispatcher.dispatchEvent(Container.java:3090)
    15. java.awt.Container.dispatchEventImpl(Container.java:1609)
    16. java.awt.Window.dispatchEventImpl(Window.java:1585)
    17. java.awt.Component.dispatchEvent(Component.java:3439)
    18. java.awt.EventQueue.dispatchEvent(EventQueue.java:450)
    19. java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:197)
    20. java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
    21. java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)
    22. java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
    23. java.awt.EventDispatchThread.run(EventDispatchThread.java:99)
    23 frames