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Build: NetBeans IDE 7.0 Beta (Build 201011152355) VM: Java HotSpot(TM) Client VM, 17.0-b17, Java(TM) SE Runtime Environment, 1.6.0_21-b07 OS: Windows XP Stacktrace: java.lang.NullPointerException at javax.swing.plaf.basic.BasicListUI.updateLayoutState(BasicListUI.java:1351) at javax.swing.plaf.basic.BasicListUI.maybeUpdateLayoutState(BasicListUI.java:1294) at javax.swing.plaf.basic.BasicListUI$Handler.valueChanged(BasicListUI.java:2611) at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:167) at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:147) at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:194)
Created attachment 107247 [details] stacktrace
More info about reproducible steps would be needed to file against JDK.
agreed v/c
I guess this exception is triggered when you manipulate the model from outside the EDT.