Java issue on MATLAB start up

28 次查看（过去 30 天）
Leanne Wake
Leanne Wake 2022-9-27
回答： Harshit Gupta 2022-10-3
The error message I am getting is as follows. I have reinstalled MATLAB but the problem persists:
I am running 2021a on a Mac OS Monterey v 12.3
Warning: the font "Times" is not available, so "Lucida Bright" has been substituted, but may have unexpected appearance or behavor. Re-enable the "Times" font to remove this warning.
Warning: the font "Times" is not available, so "Lucida Bright" has been substituted, but may have unexpected appearance or behavor. Re-enable the "Times" font to remove this warning.
Exception in thread "ContributedToolsLoader": java.lang.NoClassDefFoundError: Could not initialize class java.nio.file.FileSystems$DefaultFileSystemHolder
at java.nio.file.FileSystems.getDefault(FileSystems.java:176)
at java.io.File.toPath(File.java:2234)
at com.mathworks.resources_folder.ResourcesFolderUtils.getResourcesFolderName(ResourcesFolderUtils.java:31)
at com.mathworks.mde.desk.ContributedTools.constructToolSetFileName(ContributedTools.java:103)
at com.mathworks.mde.desk.ContributedTools.<init>(ContributedTools.java:65)
at com.mathworks.mde.desk.ContributedToolsLoader$3.run(ContributedToolsLoader.java:69)
at java.lang.Thread.run(Thread.java:748)
Exception in thread "Startup Class Loader": java.lang.NoClassDefFoundError: Could not initialize class com.mathworks.instutil.InstutilResourceKeys
at com.mathworks.mlwidgets.help.DocCenterRoot.initDocRelease(DocCenterRoot.java:44)
at com.mathworks.mlwidgets.help.DocCenterRoot.<clinit>(DocCenterRoot.java:26)
at com.mathworks.mlwidgets.help.HelpPrefs.<clinit>(HelpPrefs.java:56)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at com.mathworks.mlservices.MLHelpServices.getDocRoot(MLHelpServices.java:522)
at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.getDocrootDirectory(ProductInfoUtils.java:707)
at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.getAbsolutePath(ProductInfoUtils.java:694)
at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.parseFile(ProductInfoUtils.java:259)
at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.parseFiles(ProductInfoUtils.java:319)
at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.pathChanged(ProductInfoUtils.java:154)
at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.<init>(ProductInfoUtils.java:80)
at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.getAllProductsInfo(ProductInfoUtils.java:900)
at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.<clinit>(ProductInfoUtils.java:66)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at com.mathworks.mde.desk.StartupClassLoader$LoadInfo.<init>(StartupClassLoader.java:112)
at com.mathworks.mde.desk.StartupClassLoader.createLoadInfos(StartupClassLoader.java:202)
at com.mathworks.mde.desk.StartupClassLoader.access$500(StartupClassLoader.java:25)
at com.mathworks.mde.desk.StartupClassLoader$2.run(StartupClassLoader.java:223)
at java.lang.Thread.run(Thread.java:748)
Exception in thread "AWT-EventQueue-0": java.lang.NoClassDefFoundError: Could not initialize class java.nio.file.FileSystems$DefaultFileSystemHolder
at java.nio.file.FileSystems.getDefault(FileSystems.java:176)
at java.nio.file.Paths.get(Paths.java:84)
at java.util.logging.FileHandler.openFiles(FileHandler.java:472)
at java.util.logging.FileHandler.<init>(FileHandler.java:344)
at com.mathworks.instwiz.WILogger.start(WILogger.java:86)
at com.mathworks.instwiz.AutoCreateLogFileWILogger.superStart(AutoCreateLogFileWILogger.java:54)
at com.mathworks.instwiz.AutoCreateLogFileWILogger.access$500(AutoCreateLogFileWILogger.java:21)
at com.mathworks.instwiz.AutoCreateLogFileWILogger$StartRequestedState.log(AutoCreateLogFileWILogger.java:180)
at com.mathworks.instwiz.AutoCreateLogFileWILogger.log(AutoCreateLogFileWILogger.java:101)
at com.mathworks.instwiz.WILogger.severe(WILogger.java:274)
at com.mathworks.webintegration.vrd.VRDViewMATLAB.exception(VRDViewMATLAB.java:341)
at com.mathworks.webintegration.vrd.VRDViewMATLAB$6.run(VRDViewMATLAB.java:357)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
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)
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.mathworks.mde.webintegration.supportrequest.SupportRequestFactory.launchSupportRequest(SupportRequestFactory.java:44)
at com.mathworks.mde.desk.MLDesktop$SupportRequestAction.actionPerformed(MLDesktop.java:3365)
at com.mathworks.mwswing.ChildAction.actionPerformed(ChildAction.java:214)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at com.mathworks.toolstrip.plaf.RegularButtonUI$RegularToolstripButtonListener.mouseReleasedImpl(RegularButtonUI.java:364)
at com.mathworks.toolstrip.plaf.RegularButtonUI$RegularToolstripButtonListener.mouseReleased(RegularButtonUI.java:354)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
at java.awt.Component.processMouseEvent(Component.java:6539)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at com.mathworks.mwswing.MJButton.processMouseEvent(MJButton.java:350)
at java.awt.Component.processEvent(Component.java:6304)
at java.awt.Container.processEvent(Container.java:2239)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2297)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4904)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4535)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4476)
at java.awt.Container.dispatchEventImpl(Container.java:2283)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84)
at java.awt.EventQueue$4.run(EventQueue.java:733)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
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)
Caused by: java.lang.NoClassDefFoundError: Could not initialize class com.mathworks.webservices.urlmanager.ReleaseEnvImpl
at com.mathworks.webservices.urlmanager.UrlManagerImpl.<init>(UrlManagerImpl.java:39)
at com.mathworks.webservices.urlmanager.UrlManagerFactory.createUrlManager(UrlManagerFactory.java:13)
at com.mathworks.mlwebservices.WSEndPoints.getURLFromKeyOrOverride(WSEndPoints.java:236)
at com.mathworks.mlwebservices.WSEndPoints.getSupportRequestWSEndPoint(WSEndPoints.java:115)
at com.mathworks.webintegration.supportrequest.SubmitSupportRequestComponent.<clinit>(SubmitSupportRequestComponent.java:83)
at com.mathworks.webintegration.supportrequest.SubmitSupportRequestDialog.invoke(SubmitSupportRequestDialog.java:42)
... 46 more
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.mathworks.mde.webintegration.supportrequest.SupportRequestFactory.launchSupportRequest(SupportRequestFactory.java:44)
at com.mathworks.mde.desk.MLDesktop$SupportRequestAction.actionPerformed(MLDesktop.java:3365)
at com.mathworks.mwswing.ChildAction.actionPerformed(ChildAction.java:214)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at com.mathworks.toolstrip.plaf.RegularButtonUI$RegularToolstripButtonListener.mouseReleasedImpl(RegularButtonUI.java:364)
at com.mathworks.toolstrip.plaf.RegularButtonUI$RegularToolstripButtonListener.mouseReleased(RegularButtonUI.java:354)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
at java.awt.Component.processMouseEvent(Component.java:6539)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at com.mathworks.mwswing.MJButton.processMouseEvent(MJButton.java:350)
at java.awt.Component.processEvent(Component.java:6304)
at java.awt.Container.processEvent(Container.java:2239)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2297)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4904)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4535)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4476)
at java.awt.Container.dispatchEventImpl(Container.java:2283)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84)
at java.awt.EventQueue$4.run(EventQueue.java:733)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
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)
Caused by: java.lang.NoClassDefFoundError: Could not initialize class com.mathworks.webintegration.supportrequest.SubmitSupportRequestComponent
at com.mathworks.webintegration.supportrequest.SubmitSupportRequestDialog.invoke(SubmitSupportRequestDialog.java:42)
... 46 more
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.mathworks.mde.webintegration.supportrequest.SupportRequestFactory.launchSupportRequest(SupportRequestFactory.java:44)
at com.mathworks.mde.desk.MLDesktop$SupportRequestAction.actionPerformed(MLDesktop.java:3365)
at com.mathworks.mwswing.ChildAction.actionPerformed(ChildAction.java:214)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at com.mathworks.toolstrip.plaf.RegularButtonUI$RegularToolstripButtonListener.mouseReleasedImpl(RegularButtonUI.java:364)
at com.mathworks.toolstrip.plaf.RegularButtonUI$RegularToolstripButtonListener.mouseReleased(RegularButtonUI.java:354)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
at java.awt.Component.processMouseEvent(Component.java:6539)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at com.mathworks.mwswing.MJButton.processMouseEvent(MJButton.java:350)
at java.awt.Component.processEvent(Component.java:6304)
at java.awt.Container.processEvent(Container.java:2239)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2297)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4904)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4535)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4476)
at java.awt.Container.dispatchEventImpl(Container.java:2283)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84)
at java.awt.EventQueue$4.run(EventQueue.java:733)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
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)
Caused by: java.lang.NoClassDefFoundError: Could not initialize class com.mathworks.webintegration.supportrequest.SubmitSupportRequestComponent
at com.mathworks.webintegration.supportrequest.SubmitSupportRequestDialog.invoke(SubmitSupportRequestDialog.java:42)
... 46 more
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回答（1 个）

Harshit Gupta
Harshit Gupta 2022-10-3
It is my understanding that you are getting the following two errors:
1. Warning: the font "Times" is not available, so "Lucida Bright" has been substituted, but may have unexpected appearance or behavor. Re-enable the "Times" font to remove this warning.
This warning has no functional effect on MATLAB. The only negative impact is the undesirable message appearing on startup.
In order to prevent the warning message from appearing, please ensure MATLAB is updated to at least R2021b Update 3 or any release since R2022a.
2. Exception in thread "ContributedToolsLoader": java.lang.NoClassDefFoundError: Could not initialize class java.nio.file.FileSystems$DefaultFileSystemHolder
at java.nio.file.FileSystems.getDefault(FileSystems.java:176) ........
This issue is most likely related to "jar" files missing from the MATLAB "javaclasspath". You can see what files are found on this path by executing the following command in the Command Window:
>> javaclasspath
There could be a couple of causes for this issue:
1. The "javaclasspath" is generated from the contents of a "classpath.txt" file that is auto-generated by MATLAB during installation. If this file gets corrupted somehow, it can cause ".jar" files to be missing from the javaclasspath.
Locate and open the "classpath.txt" file by executing the below command:
>> edit classpath.txt
To add ".jar" file locations to your static javaclasspath you can create a javaclasspath.txt file and save it in your preferences directory. If you do not currently have a javaclasspath.txt file, you can run the following commands in the Command Window to create one:
>> cd(prefdir)
>> edit javaclasspath.txt
Copy and paste all the contents from the classpath.txt file to your newly created javaclasspath.txt file. Then save and close "javaclasspath.txt".
To check if the appropriate .jar files were added to the static javaclasspath you can run the
>> javaclasspath
command again.
2. It's also possible the ".jar" files are missing from the appropriate folders that the javaclasspath is referencing.
The easiest way to ensure all necessary ".jar" files are installed in the appropriate directories is to cmpletely uninstall and reinstall MATLAB.
Please refer to the following link for more information on how to completely uninstall MATLAB from MacOS:
https://www.mathworks.com/matlabcentral/answers/101657-how-do-i-uninstall-matlab-on-a-mac-os-x-machine

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