将泛型类型的所有派生类型映射到一个表中

import java.util.HashMap;
import java.util.Map;

class Animal {
    private String name;
    public Animal(String name) { this.name = name; }
    public String getName() { return name; }
}

class Dog extends Animal {
    public Dog(String name) { super(name); }
}

class Cat extends Animal {
    public Cat(String name) { super(name); }
}

public class GenericMappingExample {
    public static <T extends Animal> void mapAnimals(Map<String, T> map, T... animals) {
        for (T animal : animals) {
            map.put(animal.getName(), animal);
        }
    }

    public static void main(String[] args) {
        Map<String, Animal> animalMap = new HashMap<>();
        Dog dog1 = new Dog("Buddy");
        Cat cat1 = new Cat("Whiskers");

        mapAnimals(animalMap, dog1, cat1);

        for (Map.Entry<String, Animal> entry : animalMap.entrySet()) {
            System.out.println(entry.getKey() + ": " + entry.getValue().getClass().getSimpleName());
        }
    }
}