Java get generic type of static method at runtime

Question

So I was reading through the source code of Collections.java, there is a generic method copy().

I simplified it to this:

public static <T> void copy(List<? super T> dest, List<? extends T> src) {
    System.out.println(dest.getClass());
    for (int i = 0; i < src.size(); i++)
        dest.set(i, src.get(i));
}

It makes sense syntactically, since dest is consumer and src is producer, but I really want to know what is T here.

For example:

    public static void main(String[] args) {
        List<Number> dest = new ArrayList<>(5) {
            {
                for (int i = 0; i < 5; i++)
                    add(null);
            }
        };

        List<Integer> src = new ArrayList<>(5) {
            {
                add(1);
                add(2);
                add(3);
                add(4);
                add(5);
            }
        };

        copy(dest, src);
        System.out.println(dest);
    }

What does T stand for in this scenario? Is there any why to get the T at runtime?