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

我知道在抽象类中，方法既是抽象的，也不是抽象的.但是为什么我不能在正常"的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?

提前感谢您的解释！

推荐答案

Abstract 方法基本上是说，该方法没有实现，需要在子类中实现.但是，如果您在 非抽象 类中有一个 抽象 方法，则可以实例化该类并获取一个对象，该对象将有一个未实现的方法，您将无法实现打电话.

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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