An error that class in rt. The jar there, but just couldn't retrieve,
Online tried a lot of methods are useless

CodePudding user response:

Right-click the project - & gt; The properties, & gt; The Java Build path - & gt; Libraries - & gt; Delete the JRE System Library, and then to add JRE System Library

Did look at your specific configuration under the path of rt. The jar, a rt. The jar then consider whether to call

CodePudding user response:

I have tried this method, but still complains

JRE System Library is deleted before to add in