Re: Generics & Comparable

I'm confused. This may not even make sense but in trying to figure it out
I think I've fried my brain beyond rational thought.

Can you generisize a class C such that the compareTo will only work for
any 2 generic types T1 & T2 given a common comparable ancestor of T1 & T2?
Something like this (only this doesn't work):

public class C<T extends Comparable<? super T>>
   implements Comparable<DataElement<T>>
{
 private T _val;
 public C(T val)
 {
   _val = val;
 }

 public T getValue()
 {
   return(_val);
 }

 public int compareTo(C<T> obj)
 {
   return (getValue().compareTo(obj.getValue()));
 }
}

where

import java.util.Date;
import java.sql.Timestamp;

public class CTest
{
 @Test
 public final void testCompareTo()
 {
   C<Date> dt = new C<Date>(new Date());
   C<Timestamp> ts = new C<Timestamp>(new Timestamp(3));
   dt.compareTo(ts);
   ts.compareTo(dt);
 }
}