Java Collection LinkedList Function Argument Types [duplicate]

Question

Possible Duplicate:
Why aren't Java Collections remove methods generic?

I noticed that few of the LinkedList operations take Generic parameter type E, while a few take 'Object' as the parameter. For ex,

add(E e) 
remove(Object o) 

Is there a specific reason to do that? Why not make 'remove' take a generic type E. (I know it doesn't matter after type erasure, but just wondering).

Answer 1

This is because removal operation checks for equality using equals() method and equals() method takes in an Object as parameter not generic .