int x = 1234;
int lengthOfInt = String.valueOf(x).length(); //convert integer to String
//and get length of the String
int length = (int) (Math.log10(number) + 1);
(12345 + "").length()
int length = 0;
long temp = 1;
while (temp <= number) {
length++;
temp *= 10;
}
return length;