Java：你如何访问两个级别的父类方法？ [英] Java: How do you access a parent class method two levels down?

问题描述

我有一个类，它扩展了我需要覆盖的类，但我需要调用该类的父类。既然我不能打电话给super，因为那会执行直接父母什么是获得父类父母的最佳方式？

I have a class that extends a class that I need to overide, but I need to call that class's parent class. since I can't call super since that will execute the direct parent what is the best way to get the parent of my parent class?

我确信这是一个基本的问题，但是我已经有一段时间了，因为我一直在做任何java。

I am sure this is a basic question, but its been a while since I have been doing any java.

class A
{
 public void myMethod()
 { /* ... */ }
}

class B extends A
{
 public void myMethod()
 { /* Another code */ }
}

class C extends B
{
 I need to call Class A here
 { /* Another code */ }
}

推荐答案

你不这样做：它违反了封装。

You don't: it violates encapsulation.

可以这样说，不，我不想要我自己的行为 - 我想要我父母的行为，因为它是假定的只有当它正确维护你自己的状态时你才会这样做。

It's fine to say, "No, I don't want my own behaviour - I want my parent's behaviour" because it's assumed that you'll only do so when it maintains your own state correctly.

然而，你不能绕过父母的行为 - 这会阻止它强制执行自己的一致性。如果父类想要允许你直接调用祖父表法，它可以通过一个单独的方法公开...但这取决于父类。

However, you can't bypass your parent's behaviour - that would stop it from enforcing its own consistency. If the parent class wants to allow you to call the grandparent method directly, it can expose that via a separate method... but that's up to the parent class.

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