如果我将子类转换为其超类，并调用在子类中被重写的方法，那么它执行被重写的方法还是原始方法? [英] If I've cast a subclass as its superclass, and call a method that was overridden in the subclass, does it perform the overridden or original method?

问题描述

考虑:

Dog 是 Animal 的子类，并且 Dog 覆盖 Animal.eat()

Dog is a subclass of Animal, and Dog overrides Animal.eat()

Animal[] animals = getAllAnimals();
for (int i = 0; i < animals.length; i++) {
    animals[i].eat();
}

如果 Animal.eat()被 Dog.eat()覆盖，则当从类型为 Animal的标识符调用该方法时将调用该方法( animals [i] ?)

If Animal.eat() is overriden by Dog.eat(), which one is called when the method is called from an identifier of type Animal (animals[i]?)

推荐答案

将调用子类方法.这就是多态的妙处.

The subclass method will be called. That's the beauty of polymorphism.

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