ArrayList<Integer> arrlist = new ArrayList<Integer>();
//This is how to reverse arrlist's oringinal order.
Collections.reverse(arrlist);
//This is how to sort in a reverse order Collections.sort(arrlist, Collections.reverseOrder());

public static void main(String[] args) { ArrayList<Integer>list = new ArrayList<>(); for(int i = 1; i < 6; i++){ // bu element index degil. list.add(i); } System.out.println(list); // [1, 2, 3, 4, 5] for (int i = list.size()-1; i >= 0; i--) { int each = list.get(i); // unboxing System.out.print(each + " "); // 5 4 3 2 1 }