Hello!

I get some compiler error I don't understand when implementing a
parameterized static method:

Bounds mismatch: The generic method sort(List<T>) of type Collection
is not applicable for the arguments (List<Integer>) since the type
Integer is not a valid substitute for the bounded parameter <T extends
Comparable<? super T>> Foo.java

I have removed all the code that has nothing to do with the problem.
So the code below does not necessarily do much. Methods foo1() and
foo2() compile fine, but method foo3() creates the compiler error. I'd
be glad if someone could tell me what the problem is here.

Cheers, Oliver Plohmann

public class Foo
{
    public static void foo1()
    {
        List<Integer> list = new ArrayList<Integer>();
        Collections.sort(list);    // compiles without error
    }

    public static <T> void foo2()
    {
        List<Integer> list = new ArrayList<Integer>();
        Collections.sort(list);    // compiles without error
    }

    public static <Integer> void foo3()
    {
        List<Integer> list = new ArrayList<Integer>();
        Collections.sort(list);    // compiler error
    }
}