Build: NetBeans IDE 7.0 Beta (Build 201011161834)
VM: Java HotSpot(TM) Client VM, 19.0-b09, Java(TM) SE Runtime Environment, 1.6.0_23-b05
OS: Windows XP

User Comments:
GUEST: in Options -> Hints -> Java ,
unchecked an option. I think it was "Dependency Scanning".

GUEST: Options->editor->hints. After clicking on "Dependency Scanning"

GUEST: Options->Editor->Hints

GUEST: Tryed to turn off Dependency scanning in Options->Editor->Hints

GUEST: Tryed to turn off dependency scanning in Hints menu.

GUEST: Removing checkboxes next to Hints available in the editor.

GUEST: Create new JavaApplication
Create new main class

Choose Tools > Options > Editor > Hints. 
From the Language drop-down list, select Java and view a list of elements for which hints are displayed (their checkboxes are selected). 
To disable hints for some categories, clear the appropriate checkboxes. 
Note: On the Hints tab, you can also disable or limit the scope of dependency scans (Dependency Scanning option). These steps can singificantly improve the performance of the IDE.

GUEST: tried to disable/enable java language intention for dependency scanning




Stacktrace: 
java.lang.NullPointerException
   at org.netbeans.modules.options.editor.spi.OptionsFilter$FilteringTreeModel.treeNodesChanged(OptionsFilter.java:250)
   at javax.swing.tree.DefaultTreeModel.fireTreeNodesChanged(DefaultTreeModel.java:468)
   at javax.swing.tree.DefaultTreeModel.nodesChanged(DefaultTreeModel.java:335)
   at javax.swing.tree.DefaultTreeModel.nodeChanged(DefaultTreeModel.java:265)
   at org.netbeans.modules.java.hints.options.HintsPanelLogic.toggle(HintsPanelLogic.java:455)
   at org.netbeans.modules.java.hints.options.HintsPanelLogic.mouseClicked(HintsPanelLogic.java:253)