java.lang.NoClassDefFoundError

Question

YinSi Zhang 2016-4-3

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/276826-java-lang-noclassdeffounderror

评论： Sudipta 2017-5-1

I'm a novice learning MATLAB. My MATLAB version is 2015a.I've learned from the guide book that by inputing demos in the command window, I can get help on how to use MATLAB with demonstration. I did as I was told and then the screen displays some error codes. The followings are the screenshot. What should I do. Hoping for solution.

Error using demo (line 21)
Java exception occurred:
java.lang.NoClassDefFoundError: Could not initialize class com.mathworks.mlwidgets.help.ProductFilterModel$InstalledState
  at com.mathworks.mlwidgets.help.DocCenterProductPrefs.getSelectedProductsFromPref(DocCenterProductPrefs.java:47)
  at com.mathworks.mlwidgets.help.DocCenterProductPrefs.getProductFilterModel(DocCenterProductPrefs.java:33)
  at com.mathworks.mlwidgets.help.DocCenterDocConfigParams.<init>(DocCenterDocConfigParams.java:37)
  at com.mathworks.mlwidgets.help.DocCenterDocConfig.getLocalConfig(DocCenterDocConfig.java:77)
  at com.mathworks.mlwidgets.help.DocCenterDocConfig.getInstance(DocCenterDocConfig.java:65)
  at com.mathworks.mlwidgets.help.DocCenterUtils$DefaultDependencyProvider.getDocConfig(DocCenterUtils.java:310)
  at com.mathworks.mlwidgets.help.DocCenterUtils.getDocConfig(DocCenterUtils.java:166)
  at com.mathworks.mlwidgets.help.DocCenterUtils.getExamplesUrlForDemoCommand(DocCenterUtils.java:157)
  at com.mathworks.mde.help.DocCenterBrowserHandler.showDemos(DocCenterBrowserHandler.java:595)
  at com.mathworks.mde.help.DocCenterBrowserHandler.showDemos(DocCenterBrowserHandler.java:574)
  at com.mathworks.mde.help.HelpBrowserBridge.showDemos(HelpBrowserBridge.java:182)
  at com.mathworks.mlservices.MLHelpServices.showDemos(MLHelpServices.java:217)