Method has the same erasure as another method in type

Question

Why is it not legal to have the following two methods in the same class?

class Test{
   void add(Set ii){}
   void add(Set ss){}         


        

Answer 1

It could be possible that the compiler translates Set(Integer) to Set(Object) in java byte code. If this is the case, Set(Integer) would be used only at compile phase for syntax checking.