int carry = 0;
    int total = Math.max(tempArray.length, tempArrayTwo.length);
    int[] subArray = new int[total];
    for (int i = differenceArray.length - 1; i >= 0; i--) {
        int first = i < tempArray.length ? tempArray[tempArray.length - i - 1] : 0;
        int second = i >= tempArrayTwo.length ?  0 : tempTwoArray[tempTwoArray.length - i - 1];
        int difference = first - second - carry;
        carry = 0;
        if (difference < 0) {
            difference = difference + 10;
            System.out.println(difference);
            carry = 1;
        }
        subArray[subArray.length - 1 - i] = difference;