Why do classes fall off in Eclipce?

Question

Java

Has anyone had this?

I'm writing an application... and suddenly Eclipce gives an error during the build - such a class does not exist and, accordingly, the exception falls out as if the file does not exist.
and before that it existed and was imported and everything was ok.

I found a cure - I go into this "non-existent class. I change the name. I save. I change the name back. I save. And lo and behold, it exists again.
And such garbage happens regularly. What a normal application, what a spring. Reinstalling Eclipce did not help.

Answer 1

The problem was in different versions of JDK and JRE