Solution in Java - feel free to review my code -

int[] tripletsResult = new int[2];

    for (int i = 0; i < a.size(); i++) {
        if (a.get(i) > b.get(i)) {
            tripletsResult[0] = tripletsResult[0] + 1;
        } else if (b.get(i) > a.get(i)) {
            tripletsResult[1] = tripletsResult[1] + 1;
        }
    }

            List<Integer> tripletsResult1 = new ArrayList<>(List.of(tripletsResult[0], tripletsResult[1]));

            return tripletsResult1;

    List<Integer> tripletsResult1 = new ArrayList<>(List.of(tripletsResult[0], tripletsResult[1]));

    return tripletsResult1;