或者说，抽象类的正确使用是什么？

Or rather, what's the proper use of abstract classes?

youdao

具有非抽象方法的抽象类，如果一个新的抽象类的对象不能被创建的点是什么？

What is the point of having non abstract methods in the abstract class if a new object of the abstract class can't be created?

youdao

接口和抽象类的区别是什么？

What's the difference between an interface and abstract class?

youdao

接口和抽象类的区别是什么？

What's the difference between System. String and System. StringBuilder classes?

youdao

接口和抽象类的区别是什么？

What's the difference between System. String and System. StringBuilder classes?

youdao