Possible Duplicate:
Why aren't Java Collections remove methods generic?
Why is the signature of Collection.remove() defined as follows:
public boolean remove(Object o)
and not
public boolean remove(E e)
where E is the type of collection.
We know if c is a Collection of type E [Collection<E>] then c will always contain objects of E or sub classes of E. Then why don't we restrict the method parameter to either E or ? extends E
