Myeclipse学习总结（10）——MyEclipse2014导入项目时The project was not built since its build问题

今天在GitHub下载了当当网开源的Dubbox源码,将工程源码导入Myeclipse进行学习，Maven Update完成后出现The project was not built since its build path is incomplete. Cannot find the class file forJava.lang.Object的错误

解决办法:将工程源码重新清理并且编译.