No enclosing instance of type Person is accessible. Must qualify the allocation with an enclosing in

type Person is accessible. Must qualify the allocation with an enclosing in"/>

No enclosing instance of type Person is accessible. Must qualify the allocation with an enclosing in

No enclosing instance of type Person is accessible. Must qualify the allocation with an enclosing instance of type Person (e.g. x.new A() where x is an instance of Person).

问题：抽象类不能当作成员属性来使用，可以定义但是访问不到
解决方法：不要放在类的本身，把抽象类从main方法中拿出来与最上面的类平级