java.lang.NullPointerException
	at org.netbeans.modules.java.j2seproject.J2SEProjectUtil.isMainClass(J2SEProjectUtil.java:167)
	at org.netbeans.modules.java.j2seproject.J2SEActionProvider.isSetMainClass(J2SEActionProvider.java:478)
	at org.netbeans.modules.java.j2seproject.J2SEActionProvider.getTargetNames(J2SEActionProvider.java:199)
	at org.netbeans.modules.java.j2seproject.J2SEActionProvider.invokeAction(J2SEActionProvider.java:130)
	at org.netbeans.modules.project.ui.actions.MainProjectAction.actionPerformed(MainProjectAction.java:90)
	at org.openide.windows.TopComponent.processKeyBinding(TopComponent.java:800)
	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)