您需要向该类添加类型变量：
public abstract class Animal<F extends AnimalFeed> {
public abstract void eat(F somethingToEat);
}
然后，您可以将子类声明为需要特定类型的AnimalFeed：
public class Bird extends Animal<BirdFeed> {
public void eat(BirdFeed somethingToEat) {}
}
public class Fish extends Animal<FishFeed> {
public void eat(FishFeed somethingToEat) {}
}
602392714
清零编程群