java.lang.IllegalStateException: Class not found in index: javax.swing.JFrame.AccessibleJFrame
	at org.netbeans.modules.javacore.jmiimpl.javamodel.MetadataElement.createElement(MetadataElement.java:1041)
	at org.netbeans.modules.javacore.jmiimpl.javamodel.SemiPersistentElement.persistChildren(SemiPersistentElement.java:868)
	at org.netbeans.modules.javacore.jmiimpl.javamodel.JavaClassImpl.matchPersistent(JavaClassImpl.java:457)
	at org.netbeans.modules.javacore.jmiimpl.javamodel.SemiPersistentElement.setElementInfo(SemiPersistentElement.java:94)
	at org.netbeans.modules.javacore.jmiimpl.javamodel.ResourceImpl.initChildren(ResourceImpl.java:281)
	at org.netbeans.modules.javacore.jmiimpl.javamodel.ResourceImpl.initChildren(ResourceImpl.java:258)
	at org.netbeans.modules.javacore.jmiimpl.javamodel.MetadataElement.initCheck(MetadataElement.java:129)
	at org.netbeans.modules.javacore.jmiimpl.javamodel.SemiPersistentElement.checkUpToDate(SemiPersistentElement.java:217)
	at org.netbeans.modules.javacore.jmiimpl.javamodel.JavaClassImpl.getTypeParameters(JavaClassImpl.java:366)
	at org.netbeans.jmi.javamodel.JavaClass$Impl.getTypeParameters(Unknown Source)
	at org.netbeans.modules.javacore.JMManager.traverseGenericElement(JMManager.java:833)
	at org.netbeans.modules.javacore.JMManager.traverseClass(JMManager.java:845)
	at org.netbeans.modules.javacore.JMManager.traverseResource(JMManager.java:828)
	at org.netbeans.modules.javacore.JMManager.resolveCPRoot(JMManager.java:810)
	at org.netbeans.modules.javacore.JMManager.resolveCodebases(JMManager.java:710)
	at org.netbeans.modules.javacore.JMManager$2.run(JMManager.java:685)
	at org.openide.util.Task.run(Task.java:136)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:330)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:686)