Passing a List to a method?

Question

Hello,
I'm having problems sending a List to a method.
To declare the list, I wrote:
List<Integer> deck = new List<Integer>();
To pass it, I wrote:
keyStream(deck);
And the keyStream method is:
*public int keyStream(List deck) {*
*          return findTop(deck);*
This is just a short snippet of my entire code, but in each case that I try to pass the method, the error has an arrow pointing to the word List. Am I forgetting something big? I just started programming again, I took a break over the summer, so it's all coming back to me.
Thanks

Answer 1

import java.util.ArrayList;
import java.util.List;
public class ListExample {
    public void f() {
        List < Integer > list = new ArrayList < Integer > ();
        g(list);
    public void g(List < Integer > list) {
}java.util.List is an interface. You can't instantiate an interface.