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Super bounded WildCards -Doubt

 
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Please help me explaining why this snippet would give ,capture-of error.
when i call this method.
This is exapmly frm K&B ,chap7pg 590.

With super-bounded ,we can pass generic type or super type but still erorr is coming.

void checkAnimals(List<? super Animal> animals) //Animal +subtype +no modification promise
{

animals.add(new Dog());

for(Animal a :animals ) //------animals give error
{
if(a!=null)
a.checkUp();
}
}
 
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Hi Lucky,

since we could do the following:Do you see the problem?
 
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