ArrayList of Integers inside a while loop is refusing to print

I am solving a problem from Advent of Code, and trying to put the content of the input file into an arraylist, here's my code for that:

ArrayList<Integer> arrayList = new ArrayList<>();
    try (Scanner s = new Scanner(new File("input.txt")).useDelimiter(",")) {

        while (s.hasNext()) {
            int b = Integer.parseInt(s.next());
            arrayList.add(b);
        }

    }
    catch (FileNotFoundException e) {
        // Handle the potential exception
    }


    System.out.println(arrayList);

and when I run it, it does not print the arraylist. I can't understand why, could someone tell me what I did wrong?