Java可以两个类相互继承吗

不可以

test和test01相互继承

The hierarchy of the type Test01 is inconsistent 

Test01类型的层次结构不一致

The hierarchy of the type test is inconsistent

Test类型的层次结构不一致

Cycle detected: a cycle exists in the type hierarchy between test and Test01 

检测到循环：在test和Test01之间的类型层次结构中存在循环