在继承的抽象类中重写抽象方法 [英] overriding abstract methods in an inherited abstract class

问题描述

好吧，基本上我有以下问题：我试图让一个抽象类继承另一个具有抽象方法的抽象类，但是我不想在其中任何一个中实现抽象方法，因为第三个类

Okay so basically I have the following problem: I'm trying to have an abstract class inherit another abstract class that has an abstract method, but I don't want to implement the abstract method in either of them because a third class inherits from both of them:

public abstract class Command
{
      public abstract object execute();
}

public abstract class Binary : Command
{
     public abstract object execute(); //the issue is here
}

public class Multiply : Binary
{
     public override object execute()
     {
           //do stuff
     }
}

我正在尝试将二进制命令与一元命令，但不想/不能在其中任何一个中执行execute方法。我考虑过让Binary覆盖抽象方法（因为必须这样做），然后抛出未实现的异常。如果我将其重写，则必须声明一个主体，但是如果我将其抽象，则将隐藏继承的方法。

I'm trying to separate binary commands from unary commands but don't want to/can't implement the execute method in either. I thought about having Binary override the abstract method (since it has to), and then just throw a not implemented exception thing. If I make it override, then I must declare a body, but if I make it abstract, then I'm "hiding" the inherited method.

有什么想法吗？

推荐答案

您无需在二进制文件中声明 execute（）类，因为它已经从Command继承了。抽象方法不需要由其他抽象类实现-需求会传递到最终的具体类。

You don't need to declare execute() in the Binary class since it's already inherited from Command. Abstract methods don't need to be implemented by other abstract classes - the requirement is passed on to the eventual concrete classes.

public abstract class Command
{
    public abstract object execute();
}

public abstract class Binary : Command
{
    //the execute object is inherited from the command class.
}

public class Multiply : Binary
{
    public override object execute()
    {
        //do stuff
    }
}

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