finding the last occurence of an element in an array using reecursion

 public class lastoccurence {

    public static int last(int arr[], int key, int i) {

        if (i == arr.length) {

            return -1;

        }

        int found = last(arr, key, i + 1);

        if (arr[i] == key && found == -1) {

            return i;

        }

        return found;

    }

    public static void main(String[] args) {

        int arr[] = { 12, 3, 5, 6, 7, 10, 2, 5, 4 };

        System.out.println(last(arr, 5, 0));

    }

}