为什么抽象方法只能在抽象类中声明？ [英] Why can abstract methods only be declared in abstract classes?

问题描述

我理解在抽象类中，方法既可以是抽象的，也可以不是抽象的。但为什么我不能在普通非抽象类中创建抽象方法？

I understand that in abstract classes methods be both abstract, or not. But why can I not create an abstract method in a "normal", non-abstract class?

提前感谢您的任何解释！

Thanks in advance for any explanation!

推荐答案

抽象方法基本上说，没有方法的实现，需要在子类中实现的。但是，如果在非抽象类中有抽象方法，则可以实例化该类并获取一个对象，该对象将具有未实现的方法，您将无法使用该方法打电话。

Abstract method basically says, that there is no implementation of the method and it needs to be implemented in a subclass. However if you had an abstract method in a non-abstract class, you could instantiate the class and get an object, that would have an unimplemented method, which you would be unable to call.

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