Java确定对象是哪个类 [英] Java determine which class an object is

问题描述

我有三个课程（ Carnivore ， Herbivore 和 Plant ）扩展另一个类（ Organism ）。我如何知道一个对象是哪个子类的一部分？到目前为止，我有一个属性具有类的名称，但我认为可以使用类似于javascript的typeof的运算符。 （类似于： Carnivore的有机体类型）

I have three classes (Carnivore, Herbivore, and Plant) that extend another class (Organism). How can I tell which subclass an object is a part of? So far I have a property that has the classes' name, but I think it could be possible to use an operator similar to javascript's typeof. (Similar to: Organism typeof Carnivore)

推荐答案

instanceof 关键字。

但是，需要使用这通常是一个糟糕的设计的迹象。您通常应该在每个派生类中编写方法覆盖，以便您不需要显式地检查哪个类是什么。

Note, however, that needing to use this is often a sign of a bad design. You should typically write method overrides in each of your derived classes so that you don't explicitly need to check which class something is.

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