how to find the smallest numbers in an arraylist java

1import java.util.ArrayList;
2 
3import java.util.Scanner;
4 
5public class IndexOfSmallest {
6 
7    public static void main(String[] args) {
8 
9        Scanner scanner = new Scanner(System.in);
10      
11        ArrayList<Integer> list = new ArrayList<>();
12 
13        while (true) {
14 
15            int input = Integer.valueOf(scanner.nextLine());
16 
17            if (input == 9999) {
18 
19                break;
20 
21            }
22 
23            list.add(input);
24 
25        }
26 
27        System.out.println("");
28 
29        int smallest = list.get(0);
30 
31        int index = 0;
32 
33        while (index < list.size()) {
34 
35            if (list.get(index) < smallest) {
36 
37                smallest = list.get(index);
38 
39            }
40 
41            index++;
42 
43        }
44 
45        System.out.println("Smallest number: " + smallest);
46 
47        index = 0;
48 
49        while (index < list.size()) {
50 
51            if (list.get(index) == smallest) {
52 
53                System.out.println("Found at index: " + index);
54 
55            }
56 
57            index++;
58 
59        }
60 
61    }
62 
63}