java.lang.NullPointerException
	at org.netbeans.modules.java.j2seproject.ui.customizer.J2SESourceRootsUi$FileRenderer.getTableCellRendererComponent(J2SESourceRootsUi.java:412)
	at javax.swing.JTable$AccessibleJTable.getAccessibleChild(JTable.java:4457)
	at javax.swing.JTable$AccessibleJTable.getAccessibleAt(JTable.java:4838)
	at javax.swing.JTable$AccessibleJTable.valueChanged(JTable.java:4357)
	at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:187)
	at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:167)
	at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:214)
	at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:402)
	at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:411)
	at javax.swing.DefaultListSelectionModel.setSelectionInterval(DefaultListSelectionModel.java:435)
	at javax.swing.JTable.changeSelectionModel(JTable.java:1505)
	at javax.swing.JTable.changeSelection(JTable.java:1547)
	at javax.swing.plaf.basic.BasicTableUI$NavigationalAction.actionPerformed(BasicTableUI.java:186)
	at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1530)
	at javax.swing.JComponent.processKeyBinding(JComponent.java:2438)
	at javax.swing.JTable.processKeyBinding(JTable.java:3292)
	at javax.swing.JComponent.processKeyBindings(JComponent.java:2484)
	at javax.swing.JComponent.processKeyEvent(JComponent.java:2401)
	at java.awt.Component.processEvent(Component.java:4909)
	at java.awt.Container.processEvent(Container.java:1569)
	at java.awt.Component.dispatchEventImpl(Component.java:3615)
	at java.awt.Container.dispatchEventImpl(Container.java:1627)
	at java.awt.Component.dispatchEvent(Component.java:3477)
	at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1713)
	at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:627)
	at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:831)
	at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:741)
	at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:592)
	at java.awt.Component.dispatchEventImpl(Component.java:3506)
	at java.awt.Container.dispatchEventImpl(Container.java:1627)
	at java.awt.Window.dispatchEventImpl(Window.java:1606)
	at java.awt.Component.dispatchEvent(Component.java:3477)
[catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:456)
	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)