public static void main(String[] args) {
    // TODO Auto-generated method stub
    List<item> l = new ArrayList<item>();
    List<Integer> ll = new ArrayList<Integer>();
    for (int i = 0; i < 10; i++) {
        l.add(new item(i,i));
        ll.add(i);
    }
    System.out.println(l.get(4).getWeight());
    System.out.println(ll.get(4));
}