java.lang.NullPointerException

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Solutions on the web123955

  • via Terracotta by unnutz, 11 months ago
    This exception has no message.
  • This exception has no message.
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  • Stack trace

    • java.lang.NullPointerException at net.sf.jabref.groups.GroupTreeNode.hashCode(GroupTreeNode.java:383) at javax.swing.tree.TreePath.hashCode(Unknown Source) at java.util.Hashtable.hash(Unknown Source) at java.util.Hashtable.put(Unknown Source) at javax.swing.tree.VariableHeightLayoutCache.addMapping(Unknown Source) at javax.swing.tree.VariableHeightLayoutCache.access$000(Unknown Source) at javax.swing.tree.VariableHeightLayoutCache$TreeStateNode.setParent(Unknown Source) at javax.swing.tree.DefaultMutableTreeNode.insert(Unknown Source) at javax.swing.tree.DefaultMutableTreeNode.add(Unknown Source) at javax.swing.tree.VariableHeightLayoutCache$TreeStateNode.expand(Unknown Source) at javax.swing.tree.VariableHeightLayoutCache$TreeStateNode.expand(Unknown Source) at javax.swing.tree.VariableHeightLayoutCache.ensurePathIsExpanded(Unknown Source) at javax.swing.tree.VariableHeightLayoutCache.setExpandedState(Unknown Source) at javax.swing.plaf.basic.BasicTreeUI.updateExpandedDescendants(Unknown Source) at javax.swing.plaf.basic.BasicTreeUI$Handler.treeExpanded(Unknown Source) at javax.swing.JTree.fireTreeExpanded(Unknown Source) at javax.swing.JTree.setExpandedState(Unknown Source) at javax.swing.JTree.expandPath(Unknown Source) at net.sf.jabref.groups.GroupsTree.expandSubtree(GroupsTree.java:419) at net.sf.jabref.groups.GroupSelector.setGroups(GroupSelector.java:914) at net.sf.jabref.groups.GroupSelector.setActiveBasePanel(GroupSelector.java:1441) at net.sf.jabref.SidePaneManager.setActiveBasePanel(SidePaneManager.java:161) at net.sf.jabref.SidePaneManager$1$1.run(SidePaneManager.java:54) at java.awt.event.InvocationEvent.dispatch(Unknown Source) at java.awt.EventQueue.dispatchEventImpl(Unknown Source) at java.awt.EventQueue.access$200(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source)

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