找不到原因,头大...

图示,说我找不到包,可是这包是我自己建的怎么就找不到?

然后 ...
还发现出现这个:
有个灰色的叉叉
求教那位大神告知
https://stackoverflow.com/questions/11055016/why-is-intellij-showing-a-cross-x-over-the-class-icon-for-one-of-my-java-class
This icon shows that the class is excluded from the compilation, it can be changed in Settings(Preferences on Mac) | Compiler | Excludes.
你看看是不是排除了。