java.lang.AssertionError: Should be called in EDT only! at org.openide.explorer.view.NodeRenderer.getTreeCellRendererComponent(NodeRenderer.java:140) at org.openide.explorer.view.TreeView.initializeTree(TreeView.java:328) at org.openide.explorer.view.TreeView.(TreeView.java:252) at org.openide.explorer.view.TreeView.(TreeView.java:242) at org.openide.explorer.view.BeanTreeView.(BeanTreeView.java:98) at org.netbeans.modules.java.editor.codegen.ui.CheckTreeView.(CheckTreeView.java:73) at org.netbeans.modules.java.editor.codegen.ui.ElementSelectorPanel.(ElementSelectorPanel.java:69) at org.netbeans.modules.java.editor.codegen.ui.ConstructorPanel.(ConstructorPanel.java:81) at org.netbeans.modules.java.editor.codegen.ConstructorGenerator.invoke(ConstructorGenerator.java:189) at org.netbeans.modules.java.hints.suggestions.CreateSubclass$CreateSubclassFix$2$1.run(CreateSubclass.java:317) at org.netbeans.modules.java.hints.suggestions.CreateSubclass$CreateSubclassFix$2$1.run(CreateSubclass.java:302) at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:636) at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:626) at org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:486) at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:609) at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:153) at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:137) at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:204) at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:201) at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176) at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360) at org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:141) at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:88) at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:201) at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:104) at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:436) at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:407) at org.netbeans.api.java.source.JavaSource.runModificationTask(JavaSource.java:647) at org.netbeans.modules.java.hints.suggestions.CreateSubclass$CreateSubclassFix$2.run(CreateSubclass.java:302) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443) at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68) at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058) Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.AssertionError: Should be called in EDT only! at org.openide.util.RequestProcessor.post(RequestProcessor.java:420) at org.netbeans.modules.java.hints.suggestions.CreateSubclass$CreateSubclassFix.propertyChange(CreateSubclass.java:296) at java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:335) at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:327) at org.netbeans.api.editor.EditorRegistry.fireEvents(EditorRegistry.java:544) at org.netbeans.api.editor.EditorRegistry.focusGained(EditorRegistry.java:344) at org.netbeans.api.editor.EditorRegistry$FocusL.focusGained(EditorRegistry.java:675) at java.awt.AWTEventMulticaster.focusGained(AWTEventMulticaster.java:220) at java.awt.AWTEventMulticaster.focusGained(AWTEventMulticaster.java:219) at java.awt.Component.processFocusEvent(Component.java:6414) at java.awt.Component.processEvent(Component.java:6281) at java.awt.Container.processEvent(Container.java:2234) at java.awt.Component.dispatchEventImpl(Component.java:4881) at java.awt.Container.dispatchEventImpl(Container.java:2292) at java.awt.Component.dispatchEvent(Component.java:4703) at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1954) at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:986) at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:610) at java.awt.Component.dispatchEventImpl(Component.java:4752) at java.awt.Container.dispatchEventImpl(Container.java:2292) at java.awt.Component.dispatchEvent(Component.java:4703) at java.awt.KeyboardFocusManager.dispatchAndCatchException(KeyboardFocusManager.java:2601) at java.awt.KeyboardFocusManager.processCurrentLightweightRequests(KeyboardFocusManager.java:2697) at java.awt.KeyboardFocusManager.retargetFocusEvent(KeyboardFocusManager.java:2946) at java.awt.Component.dispatchEventImpl(Component.java:4744) at java.awt.Container.dispatchEventImpl(Container.java:2292) at java.awt.Component.dispatchEvent(Component.java:4703) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:751) at java.awt.EventQueue.access$500(EventQueue.java:97) at java.awt.EventQueue$3.run(EventQueue.java:702) at java.awt.EventQueue$3.run(EventQueue.java:696) at java.security.AccessController.doPrivileged(AccessController.java:0) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86) at java.awt.EventQueue$4.run(EventQueue.java:724) at java.awt.EventQueue$4.run(EventQueue.java:722) at java.security.AccessController.doPrivileged(AccessController.java:0) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75) at java.awt.EventQueue.dispatchEvent(EventQueue.java:721) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)