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I can't import some jar files that I put in the library. As you can see from the attached screen capture, the json-simple jar has been loaded into the project, but I can't import it. I have looked at the other bugs and solutions, and they don't seem to help. Supposedly clearing the cache would fix the problem, but I can't find the cache. It's supposed to be in C:\Users\<username>\AppData\Local\NetBeans\Cache\., but there is no NetBeans directory in AppData\Local. I have the same problem with import org.jfree.chart Other libraries work fine.
Created attachment 162958 [details] Screen capture