- Wildcards can be bounded in opposite direction
- ? super F matches any supertype of F
- public static <F> void append(
ArrayList<? super F> a, ArrayList<F> b,
int count)
{
for (int i = 0; i < count && i < b.size();
i++)
a.add(b.get(i));
}
- Safe to call ArrayList<? super F>.add:
boolean add(? super F newElement)
- Can pass any element of type F (but not a supertype!)
