什么是超类型方法？ [英] What is a supertype method?

问题描述

我用Google搜索了几次但仍无法理解超类型方法。任何人都可以解释这是什么？

I have googled couple of times but still can't understand the supertype method. Can anyone please explain what is this?

推荐答案

在OOPS中有一个超类型和子类型的概念，在java中这种关系通过继承实现，即使用 extends 关键字：

There is a notion of supertype and subtype in OOPS, In java this kind of relationship is implemented by inheritance i.e. using extends keyword:

class A {} // super class
class B extends A {} //sub class

任何成员（在超类中声明的字段，方法）将被称为超类型。

Any member (fields, methods) declared in super class is to be called supertype.

因此在上面的上下文中，如果类 A 具有方法如

Therefore in above context if class A has method like

class A {
   void set()
}

Set是类 B的超类型方法。

但是，请注意，如果有另一个班级说 C ：

However, notice that if there is another class say C:

class C {
    void set()        
}

然后 set（）对于 C 类的方法不是超类型，因为没有关系类 A 和类 C 之间的ip（关系由 extends 关键字，用于继承）。

Then set() method is not supertype for C class because there is no relationship between class A and class C (relationship is created by extends keyword, for inheritance).

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