IntelliJ IDEA: “cannot resolve symbol” for String, System and other Java classes
问题 I recently downloaded IntelliJ IDEA to a different computer. On one computer it works fine on the other computer it is giving me this current issue. When i open a new project with a template it automatically shows errors everywhere even though it allows the code to run and shows the output correctly: standard Java library classes like String and System are highlighted in red and the error tooltip says: "cannot resolve symbol". I have tried "Invalidate caches/Restart", but it didn't help. 回答1: