class is not public in my package and cannot be accessed from outside package

错误提示

class is not public in my package and cannot be accessed from outside package

含义:

If the class is not public, it is not part of the public API, so it's not intended (or really possible) for you to use.

参考

:https://stackoverflow.com/questions/23418555/class-is-not-public-in-my-package-and-cannot-be-accessed-from-outside-package