创建第二个工程为什么错了

为什么我创建Project2    建包也没问题  但是再创建一个Telphone类 就会出现错误？

Description Resource Path Location Type 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 project2     Unknown Java Problem

Description Resource Path Location Type

The type java.lang.Object cannot be resolved. It is indirectly referenced from required .class files Telphone2.java /project2/src/com/imooc line 1 Java Problem