Generics And Inheritance - Specialized Methods

I've an interface with generic methods in it. I would like to have specialized methods in the sub types. While doing that I'm seeing the following warnings in eclipse.

class Sorter {
<E> void sort(E[] elements);
};
 
class StringSorter {
 
// This gives me a warning 'hiding' to 'sort'
<String> void sort(String[] elements) {
}
 
// Gives me an error "The method someCrap(String[]) in the type StringSorter is not applicable for the arguments (String[])"
void someCrap(String[] elements) {
}
};

I would like to understand why eclipse gives the above warnings and errors.