039 Reverse Sum

public int reverseSum(int[] numbers) { int res = 0; for (int number: numbers) { char[] num = number.toCharArray(); int i = 0; int j = num.length - 1; while (number[j] == '0') { j--; } while (i <= j) { //swap the char of index i and j i++; j++; } res += (int)String.valueOf(number); } return res; }