finding the first occurence of a number in an array using recursion

 public class firstoccurence {

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

        if (arr[i] == key) {

            return i;

        }

        return first(arr, i + 1, key);

    }

    public static void main(String[] args) {

        int arr[] = { 7, 8, 9, 3, 5, 6, 8, 5 };

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

    }

}