BlueJ run started: Thu Sep 10 10:00:58 CEST 2020
BlueJ version 4.2.2
Java version 11.0.2
JavaFX version 11.0.2+1
Virtual machine: OpenJDK 64-Bit Server VM 11.0.2+9 (Oracle Corporation)
Running on: Windows 7 6.1 (amd64)
Java Home: C:\Program Files\BlueJ\jdk
----
getExtensionsClass: jarFile=._CleanProjectExtension.jar Exception=zip END header not found
java.util.zip.ZipException: zip END header not found
	at java.base/java.util.zip.ZipFile$Source.zerror(ZipFile.java:1529)
	at java.base/java.util.zip.ZipFile$Source.findEND(ZipFile.java:1430)
	at java.base/java.util.zip.ZipFile$Source.initCEN(ZipFile.java:1437)
	at java.base/java.util.zip.ZipFile$Source.<init>(ZipFile.java:1268)
	at java.base/java.util.zip.ZipFile$Source.get(ZipFile.java:1231)
	at java.base/java.util.zip.ZipFile$CleanableResource.<init>(ZipFile.java:726)
	at java.base/java.util.zip.ZipFile$CleanableResource.get(ZipFile.java:843)
	at java.base/java.util.zip.ZipFile.<init>(ZipFile.java:246)
	at java.base/java.util.zip.ZipFile.<init>(ZipFile.java:176)
	at java.base/java.util.jar.JarFile.<init>(JarFile.java:346)
	at java.base/java.util.jar.JarFile.<init>(JarFile.java:317)
	at java.base/java.util.jar.JarFile.<init>(JarFile.java:283)
	at bluej.extmgr.ExtensionWrapper.getExtensionClass(ExtensionWrapper.java:128)
	at bluej.extmgr.ExtensionWrapper.<init>(ExtensionWrapper.java:94)
	at bluej.extmgr.ExtensionsManager.loadDirectoryExtensions(ExtensionsManager.java:155)
	at bluej.extmgr.ExtensionsManager.loadExtensions(ExtensionsManager.java:105)
	at bluej.extmgr.ExtensionsManager.getInstance(ExtensionsManager.java:66)
	at bluej.Main.lambda$new$2(Main.java:152)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4$1.run(EventQueue.java:727)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
	at java.base/java.lang.Thread.run(Thread.java:834)
getExtensionsClass: jarFile=._GUI_Extension.jar Exception=zip END header not found
java.util.zip.ZipException: zip END header not found
	at java.base/java.util.zip.ZipFile$Source.zerror(ZipFile.java:1529)
	at java.base/java.util.zip.ZipFile$Source.findEND(ZipFile.java:1430)
	at java.base/java.util.zip.ZipFile$Source.initCEN(ZipFile.java:1437)
	at java.base/java.util.zip.ZipFile$Source.<init>(ZipFile.java:1268)
	at java.base/java.util.zip.ZipFile$Source.get(ZipFile.java:1231)
	at java.base/java.util.zip.ZipFile$CleanableResource.<init>(ZipFile.java:726)
	at java.base/java.util.zip.ZipFile$CleanableResource.get(ZipFile.java:843)
	at java.base/java.util.zip.ZipFile.<init>(ZipFile.java:246)
	at java.base/java.util.zip.ZipFile.<init>(ZipFile.java:176)
	at java.base/java.util.jar.JarFile.<init>(JarFile.java:346)
	at java.base/java.util.jar.JarFile.<init>(JarFile.java:317)
	at java.base/java.util.jar.JarFile.<init>(JarFile.java:283)
	at bluej.extmgr.ExtensionWrapper.getExtensionClass(ExtensionWrapper.java:128)
	at bluej.extmgr.ExtensionWrapper.<init>(ExtensionWrapper.java:94)
	at bluej.extmgr.ExtensionsManager.loadDirectoryExtensions(ExtensionsManager.java:155)
	at bluej.extmgr.ExtensionsManager.loadExtensions(ExtensionsManager.java:105)
	at bluej.extmgr.ExtensionsManager.getInstance(ExtensionsManager.java:66)
	at bluej.Main.lambda$new$2(Main.java:152)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4$1.run(EventQueue.java:727)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
	at java.base/java.lang.Thread.run(Thread.java:834)
Opening project: H:\Git\queue-stack
1599724862985: Listening for JDWP connection on address: javadebug
Connected to debug VM via dt_shmem transport...
Communication with debug VM fully established.
java.io.FileNotFoundException while reading import cache: H:Dokumente\bluej\import-cache.xml (Das System kann die angegebene Datei nicht finden)
ExtensionWrapper.safePostGenGetMenuItem: Class=org.bluej.UMLextension.UMLExtension Exception=component must be showing on the screen to determine its location
java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
	at java.desktop/java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:2101)
	at java.desktop/java.awt.Component.getLocationOnScreen(Component.java:2075)
	at org.bluej.UMLextension.MenuBuilder.notifyPostClassMenu(MenuBuilder.java:48)
	at bluej.extmgr.ClassExtensionMenu.postMenuItem(ClassExtensionMenu.java:66)
	at bluej.extensions.BlueJ.postMenuItem(BlueJ.java:964)
	at bluej.extensions.ExtensionBridge.postMenuItem(ExtensionBridge.java:142)
	at bluej.extmgr.ExtensionWrapper.safePostMenuItem(ExtensionWrapper.java:673)
	at bluej.extmgr.FXMenuManager.lambda$menuWillBecomeVisible$5(FXMenuManager.java:196)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4$1.run(EventQueue.java:727)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
	at java.base/java.lang.Thread.run(Thread.java:834)
ExtensionWrapper.safePostGenGetMenuItem: Class=org.bluej.UMLextension.UMLExtension Exception=component must be showing on the screen to determine its location
java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
	at java.desktop/java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:2101)
	at java.desktop/java.awt.Component.getLocationOnScreen(Component.java:2075)
	at org.bluej.UMLextension.MenuBuilder.notifyPostClassMenu(MenuBuilder.java:48)
	at bluej.extmgr.ClassExtensionMenu.postMenuItem(ClassExtensionMenu.java:66)
	at bluej.extensions.BlueJ.postMenuItem(BlueJ.java:964)
	at bluej.extensions.ExtensionBridge.postMenuItem(ExtensionBridge.java:142)
	at bluej.extmgr.ExtensionWrapper.safePostMenuItem(ExtensionWrapper.java:673)
	at bluej.extmgr.FXMenuManager.lambda$menuWillBecomeVisible$5(FXMenuManager.java:196)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4$1.run(EventQueue.java:727)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
	at java.base/java.lang.Thread.run(Thread.java:834)
ExtensionWrapper.safePostGenGetMenuItem: Class=org.bluej.UMLextension.UMLExtension Exception=component must be showing on the screen to determine its location
java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
	at java.desktop/java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:2101)
	at java.desktop/java.awt.Component.getLocationOnScreen(Component.java:2075)
	at org.bluej.UMLextension.MenuBuilder.notifyPostClassMenu(MenuBuilder.java:48)
	at bluej.extmgr.ClassExtensionMenu.postMenuItem(ClassExtensionMenu.java:66)
	at bluej.extensions.BlueJ.postMenuItem(BlueJ.java:964)
	at bluej.extensions.ExtensionBridge.postMenuItem(ExtensionBridge.java:142)
	at bluej.extmgr.ExtensionWrapper.safePostMenuItem(ExtensionWrapper.java:673)
	at bluej.extmgr.FXMenuManager.lambda$menuWillBecomeVisible$5(FXMenuManager.java:196)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4$1.run(EventQueue.java:727)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
	at java.base/java.lang.Thread.run(Thread.java:834)
ExtensionWrapper.safePostGenGetMenuItem: Class=org.bluej.UMLextension.UMLExtension Exception=component must be showing on the screen to determine its location
java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
	at java.desktop/java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:2101)
	at java.desktop/java.awt.Component.getLocationOnScreen(Component.java:2075)
	at org.bluej.UMLextension.MenuBuilder.notifyPostClassMenu(MenuBuilder.java:48)
	at bluej.extmgr.ClassExtensionMenu.postMenuItem(ClassExtensionMenu.java:66)
	at bluej.extensions.BlueJ.postMenuItem(BlueJ.java:964)
	at bluej.extensions.ExtensionBridge.postMenuItem(ExtensionBridge.java:142)
	at bluej.extmgr.ExtensionWrapper.safePostMenuItem(ExtensionWrapper.java:673)
	at bluej.extmgr.FXMenuManager.lambda$menuWillBecomeVisible$5(FXMenuManager.java:196)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4$1.run(EventQueue.java:727)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
	at java.base/java.lang.Thread.run(Thread.java:834)
ExtensionWrapper.safePostGenGetMenuItem: Class=org.bluej.UMLextension.UMLExtension Exception=component must be showing on the screen to determine its location
java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
	at java.desktop/java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:2101)
	at java.desktop/java.awt.Component.getLocationOnScreen(Component.java:2075)
	at org.bluej.UMLextension.MenuBuilder.notifyPostClassMenu(MenuBuilder.java:48)
	at bluej.extmgr.ClassExtensionMenu.postMenuItem(ClassExtensionMenu.java:66)
	at bluej.extensions.BlueJ.postMenuItem(BlueJ.java:964)
	at bluej.extensions.ExtensionBridge.postMenuItem(ExtensionBridge.java:142)
	at bluej.extmgr.ExtensionWrapper.safePostMenuItem(ExtensionWrapper.java:673)
	at bluej.extmgr.FXMenuManager.lambda$menuWillBecomeVisible$5(FXMenuManager.java:196)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4$1.run(EventQueue.java:727)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
	at java.base/java.lang.Thread.run(Thread.java:834)
ExtensionWrapper.safePostGenGetMenuItem: Class=org.bluej.UMLextension.UMLExtension Exception=component must be showing on the screen to determine its location
java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
	at java.desktop/java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:2101)
	at java.desktop/java.awt.Component.getLocationOnScreen(Component.java:2075)
	at org.bluej.UMLextension.MenuBuilder.notifyPostClassMenu(MenuBuilder.java:48)
	at bluej.extmgr.ClassExtensionMenu.postMenuItem(ClassExtensionMenu.java:66)
	at bluej.extensions.BlueJ.postMenuItem(BlueJ.java:964)
	at bluej.extensions.ExtensionBridge.postMenuItem(ExtensionBridge.java:142)
	at bluej.extmgr.ExtensionWrapper.safePostMenuItem(ExtensionWrapper.java:673)
	at bluej.extmgr.FXMenuManager.lambda$menuWillBecomeVisible$5(FXMenuManager.java:196)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4$1.run(EventQueue.java:727)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
	at java.base/java.lang.Thread.run(Thread.java:834)
ExtensionWrapper.safePostGenGetMenuItem: Class=org.bluej.UMLextension.UMLExtension Exception=component must be showing on the screen to determine its location
java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
	at java.desktop/java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:2101)
	at java.desktop/java.awt.Component.getLocationOnScreen(Component.java:2075)
	at org.bluej.UMLextension.MenuBuilder.notifyPostClassMenu(MenuBuilder.java:48)
	at bluej.extmgr.ClassExtensionMenu.postMenuItem(ClassExtensionMenu.java:66)
	at bluej.extensions.BlueJ.postMenuItem(BlueJ.java:964)
	at bluej.extensions.ExtensionBridge.postMenuItem(ExtensionBridge.java:142)
	at bluej.extmgr.ExtensionWrapper.safePostMenuItem(ExtensionWrapper.java:673)
	at bluej.extmgr.FXMenuManager.lambda$menuWillBecomeVisible$5(FXMenuManager.java:196)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4$1.run(EventQueue.java:727)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
	at java.base/java.lang.Thread.run(Thread.java:834)
ExtensionWrapper.safePostGenGetMenuItem: Class=org.bluej.UMLextension.UMLExtension Exception=component must be showing on the screen to determine its location
java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
	at java.desktop/java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:2101)
	at java.desktop/java.awt.Component.getLocationOnScreen(Component.java:2075)
	at org.bluej.UMLextension.MenuBuilder.notifyPostClassMenu(MenuBuilder.java:48)
	at bluej.extmgr.ClassExtensionMenu.postMenuItem(ClassExtensionMenu.java:66)
	at bluej.extensions.BlueJ.postMenuItem(BlueJ.java:964)
	at bluej.extensions.ExtensionBridge.postMenuItem(ExtensionBridge.java:142)
	at bluej.extmgr.ExtensionWrapper.safePostMenuItem(ExtensionWrapper.java:673)
	at bluej.extmgr.FXMenuManager.lambda$menuWillBecomeVisible$5(FXMenuManager.java:196)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4$1.run(EventQueue.java:727)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
	at java.base/java.lang.Thread.run(Thread.java:834)
ExtensionWrapper.safePostGenGetMenuItem: Class=org.bluej.UMLextension.UMLExtension Exception=component must be showing on the screen to determine its location
java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
	at java.desktop/java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:2101)
	at java.desktop/java.awt.Component.getLocationOnScreen(Component.java:2075)
	at org.bluej.UMLextension.MenuBuilder.notifyPostClassMenu(MenuBuilder.java:48)
	at bluej.extmgr.ClassExtensionMenu.postMenuItem(ClassExtensionMenu.java:66)
	at bluej.extensions.BlueJ.postMenuItem(BlueJ.java:964)
	at bluej.extensions.ExtensionBridge.postMenuItem(ExtensionBridge.java:142)
	at bluej.extmgr.ExtensionWrapper.safePostMenuItem(ExtensionWrapper.java:673)
	at bluej.extmgr.FXMenuManager.lambda$menuWillBecomeVisible$5(FXMenuManager.java:196)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4$1.run(EventQueue.java:727)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
	at java.base/java.lang.Thread.run(Thread.java:834)
ExtensionWrapper.safePostGenGetMenuItem: Class=org.bluej.UMLextension.UMLExtension Exception=component must be showing on the screen to determine its location
java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
	at java.desktop/java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:2101)
	at java.desktop/java.awt.Component.getLocationOnScreen(Component.java:2075)
	at org.bluej.UMLextension.MenuBuilder.notifyPostClassMenu(MenuBuilder.java:48)
	at bluej.extmgr.ClassExtensionMenu.postMenuItem(ClassExtensionMenu.java:66)
	at bluej.extensions.BlueJ.postMenuItem(BlueJ.java:964)
	at bluej.extensions.ExtensionBridge.postMenuItem(ExtensionBridge.java:142)
	at bluej.extmgr.ExtensionWrapper.safePostMenuItem(ExtensionWrapper.java:673)
	at bluej.extmgr.FXMenuManager.lambda$menuWillBecomeVisible$5(FXMenuManager.java:196)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4$1.run(EventQueue.java:727)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
	at java.base/java.lang.Thread.run(Thread.java:834)
ExtensionWrapper.safePostGenGetMenuItem: Class=org.bluej.UMLextension.UMLExtension Exception=component must be showing on the screen to determine its location
java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
	at java.desktop/java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:2101)
	at java.desktop/java.awt.Component.getLocationOnScreen(Component.java:2075)
	at org.bluej.UMLextension.MenuBuilder.notifyPostClassMenu(MenuBuilder.java:48)
	at bluej.extmgr.ClassExtensionMenu.postMenuItem(ClassExtensionMenu.java:66)
	at bluej.extensions.BlueJ.postMenuItem(BlueJ.java:964)
	at bluej.extensions.ExtensionBridge.postMenuItem(ExtensionBridge.java:142)
	at bluej.extmgr.ExtensionWrapper.safePostMenuItem(ExtensionWrapper.java:673)
	at bluej.extmgr.FXMenuManager.lambda$menuWillBecomeVisible$5(FXMenuManager.java:196)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4$1.run(EventQueue.java:727)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
	at java.base/java.lang.Thread.run(Thread.java:834)
ExtensionWrapper.safePostGenGetMenuItem: Class=org.bluej.UMLextension.UMLExtension Exception=component must be showing on the screen to determine its location
java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
	at java.desktop/java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:2101)
	at java.desktop/java.awt.Component.getLocationOnScreen(Component.java:2075)
	at org.bluej.UMLextension.MenuBuilder.notifyPostClassMenu(MenuBuilder.java:48)
	at bluej.extmgr.ClassExtensionMenu.postMenuItem(ClassExtensionMenu.java:66)
	at bluej.extensions.BlueJ.postMenuItem(BlueJ.java:964)
	at bluej.extensions.ExtensionBridge.postMenuItem(ExtensionBridge.java:142)
	at bluej.extmgr.ExtensionWrapper.safePostMenuItem(ExtensionWrapper.java:673)
	at bluej.extmgr.FXMenuManager.lambda$menuWillBecomeVisible$5(FXMenuManager.java:196)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4$1.run(EventQueue.java:727)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
	at java.base/java.lang.Thread.run(Thread.java:834)
ExtensionWrapper.safePostGenGetMenuItem: Class=org.bluej.UMLextension.UMLExtension Exception=component must be showing on the screen to determine its location
java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
	at java.desktop/java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:2101)
	at java.desktop/java.awt.Component.getLocationOnScreen(Component.java:2075)
	at org.bluej.UMLextension.MenuBuilder.notifyPostClassMenu(MenuBuilder.java:48)
	at bluej.extmgr.ClassExtensionMenu.postMenuItem(ClassExtensionMenu.java:66)
	at bluej.extensions.BlueJ.postMenuItem(BlueJ.java:964)
	at bluej.extensions.ExtensionBridge.postMenuItem(ExtensionBridge.java:142)
	at bluej.extmgr.ExtensionWrapper.safePostMenuItem(ExtensionWrapper.java:673)
	at bluej.extmgr.FXMenuManager.lambda$menuWillBecomeVisible$5(FXMenuManager.java:196)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4$1.run(EventQueue.java:727)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
	at java.base/java.lang.Thread.run(Thread.java:834)
ExtensionWrapper.safePostGenGetMenuItem: Class=org.bluej.UMLextension.UMLExtension Exception=component must be showing on the screen to determine its location
java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
	at java.desktop/java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:2101)
	at java.desktop/java.awt.Component.getLocationOnScreen(Component.java:2075)
	at org.bluej.UMLextension.MenuBuilder.notifyPostClassMenu(MenuBuilder.java:48)
	at bluej.extmgr.ClassExtensionMenu.postMenuItem(ClassExtensionMenu.java:66)
	at bluej.extensions.BlueJ.postMenuItem(BlueJ.java:964)
	at bluej.extensions.ExtensionBridge.postMenuItem(ExtensionBridge.java:142)
	at bluej.extmgr.ExtensionWrapper.safePostMenuItem(ExtensionWrapper.java:673)
	at bluej.extmgr.FXMenuManager.lambda$menuWillBecomeVisible$5(FXMenuManager.java:196)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4$1.run(EventQueue.java:727)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
	at java.base/java.lang.Thread.run(Thread.java:834)