4 lines of mayhem

    public static void main(String[] args)
    {
        List<Integer> list = new ArrayList<>();
        List<Integer> subList = list.subList(0, 0);
        list.addAll(subList);
        list.addAll(subList);
    }

    public static void main(String[] args)
    {
        List<Integer> list = new ArrayList<>();
        List<Integer> subList = list.subList(0, 0);
        list.addAll(subList);
        list.addAll(subList);
    }