Error - "java: cannot find symbol" in IntelliJ IDEA

intellij-idea, java

Solution

I believe the class is excluded from compilation - I think I've had this before.

Try: `Settings` -> `Compiler` -> `Excludes`

Problem

I want to run my project but IntelliJ IDEA version 13 shows some strange error message: Now class file has some small cross at class icon. But this code was compiled, I couldn't figure out this strange behavior. How to solve this trouble?

Original source