java.lang.NullPointerException
	at
org.netbeans.modules.java.j2seproject.J2SEProjectUtil.isMainClass(J2SEProjectUtil.java:169)
	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.ProjectAction.actionPerformed(ProjectAction.java:84)
	at
org.netbeans.modules.project.ui.actions.LookupSensitiveAction.actionPerformed(LookupSensitiveAction.java:88)
	at
javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
	at
javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)
	at
javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
	at
javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
	at javax.swing.AbstractButton.doClick(AbstractButton.java:302)
	at
javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1000)
	at
javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1041)
	at java.awt.Component.processMouseEvent(Component.java:5488)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3126)
	at java.awt.Component.processEvent(Component.java:5253)
	at java.awt.Container.processEvent(Container.java:1966)
	at java.awt.Component.dispatchEventImpl(Component.java:3955)
	at java.awt.Container.dispatchEventImpl(Container.java:2024)
	at java.awt.Component.dispatchEvent(Component.java:3803)
	at
java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
	at
java.awt.LightweightDispatcher.processMouseEvent(Container.java:3892)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
	at java.awt.Container.dispatchEventImpl(Container.java:2010)
	at java.awt.Window.dispatchEventImpl(Window.java:1774)
	at java.awt.Component.dispatchEvent(Component.java:3803)
[catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
	at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
	at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
	at
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
	at
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)