The type java.lang.Object cannot be resolved解决方法

java.lang.Object是JRE的问题。 Errors: The type java.lang.Object cannot be resolved. It is indirectly referenced from required .class files         The project was not built since its build path is incomplete. Cannot find the class file for java.lang.Object. Fix the build path then try building this project        

解決方法：

project的Property中java build path->library->JRE System Library删除，重新add Library 选择Workspace default JRE 即可。