Java方法期望参数具有多重继承 [英] Java methods expecting parameters with multiple inheritance

问题描述

我不知道为什么我无法在线找到答案.

I don't know why I can't find an answer to this online.

我有一些实现多种方法的类，我想编写一些方法来期望它们.我不知道该怎么办，甚至可能的话.

I have classes that implement multiple methods and I would like to write methods to expect them. I don't know how to do it though or if it's even possible.

例如:

public void yellAtPet(<? extends Pet implements YellableAt> arg) {
    arg.yellAt("Don't go there!"); 
    arg.pet("Good Boy");
}

推荐答案

此方法可以很好地用作通用方法，而不必使整个类都通用:

This should work fine as a generic method, without making your entire class generic:

public <T extends Pet & YellableAt> void yellAtPet(T arg) {
    arg.yellAt("Don't go there!"); 
    arg.pet("Good Boy");
}

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