正文
cannot be resolved to a type in same package 问题解决
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在 STS 上，一个类引用在相同 package 中另一个类，但是报 cannot be resolved to a type 错误。
解决方法 ：
Alternatively, you can highlight the project :
Choose
Clean ...from Project menu and if you have activated theBuild Automaticallyoption (in the same menu), the classes will be generated anew.
参考资料 :
Why can't eclipse resolve class in same package?, stackOverFlow
