is work like that?

private List<GameObject> getNeighbors(GameObject gameObject) {
        List<GameObject> result = new ArrayList<>();
        for (int y = gameObject.y - 1; y <= gameObject.y + 1; y++) {
            for (int x = gameObject.x - 1; x <= gameObject.x + 1; x++) {
                if (y < 0 || y >= SIDE) {
                    continue;
                }
                if (x < 0 || x >= SIDE) {
                    continue;
                }
                if (gameField[y][x] == gameObject) {
                    continue;
                }
                result.add(gameField[y][x]);
            }
        }
        return result;
    }

here we create an 3#3 matrix and which centre element is self object which are used to call and count number of mines on the neighbors