How to use List?

Question

I want to list.addAll, but get a error, what should I do?

The code as follow

public class Animal {

    private void speak(){
        System.out.println("Animal");
    }

    protected void name(){
        System.out.println("name");
    }
}

public class Dog extends  Animal{

    public void test(){
        super.name();
        speak();
    }
    
    private void speak(){
        System.out.println("dog");
    }
}

public class Test {

    public static void main(String[] args) {
        Dog dog = new Dog();
        dog.test();
        List<? extends Animal> animals = new ArrayList<>();
        List<Dog> dogs = new ArrayList<>();
        dogs.add(new Dog());
        dogs.add(new Dog());


        //TODO this is error
        animals.addAll(dogs);
    }
}

the error as follow

Required type: Collection <? extends capture of ? extends Animal>.
Provided: List< Dog >.