使用多个类实现一个接口 [英] Implementing one interface using multiple classes

问题描述

这个问题在接受采访时被问到了我。我在这里厌倦了谷歌搜索。

This question was asked to me in an interview. Tired of googling here I am.

我有100个方法的接口。我不想在一个类中实现所有这100个方法。有没有办法通过使用多个类而不重复实现来实现这100个方法？

I have an interface with 100 methods. I don't want to implement all those 100 methods in a single class. Is there any way I could implement these 100 methods by using more than one class and not repeating the implementation ?

例如：
A类实现前10个方法（仅限）。
B类实现接下来的10个方法（仅限）等等。

For Example : Class A implements first 10 methods(only). Class B implements next 10 methods(only) and so on.

注意：
1.所有实现接口的类必须具体。

据我所知，这是不可能的。当他问我这个问题时，他提到了适配器。这让我觉得有办法做到这一点。

As far as my knowledge on java this isn't possible. He mentioned about adapter when he asked me this question. That made me think that there's a way to do it.

有人可以澄清一下吗？

推荐答案

写一个适配器100个方法的空实现

Write an adapter with empty implementation of the 100 methods

 class Adapter{
    //write your empty implementations here as similar to KeyListener in Java
    // They have written a keyAdapter and make use of key adapter.

    }

ie) class Adapter implements interface1{
    public void method1(){}
    public void method2(){}
     .....
}

您可以在其他类中扩展适配器类只是覆盖方法。

You can extend the adapter class in some other class and just override the methods.

class A extedns Adapter{
    public void method1(){
}
}

ie）

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