Generics Question

[temesgen kahsay]

Hi ranchers, i am new to post but i almost read the forum daily. and to come to my question,
why is the line commented as "This line" not working

import java.util.*; 
class Animal {} 
class Dog extends Animal {} 
class Cat extends Animal {} 
class generics4 { 
public void addAnimal(List<? super Dog> animals) { 
animals.add(new Dog()); 
animals.add(new Animal());//This line 
} 
public static void main(String[] args) { 
List<Animal> animals = new ArrayList<Animal>(); 
animals.add(new Dog()); 
animals.add(new Dog()); 
animals.add(new Cat()); 
generics4 doc = new generics4(); 
doc.addAnimal(animals); 
} 
} 

[Henry Wong]

You already asked this exact question yesterday. And it has already been answered.

https://coderanch.com/t/465227/Programmer-Certification-SCJP/certification/Why-not-working

Henry