Question

I need to add 8 numbers together from a string.E.g. If someone enters say 1234 it will add the numbers together 1 + 2 + 3 + 4 = 10 then 1 + 1 = 2. I have done this so far. I cannot figure out how to add these numbers up using a for loop.

String num2;     
String num3;   
num2 = (jTextField1.getText());
num3 = num2.replaceAll("[/:.,-0]", "");

String[] result = num3.split("");

int inte = Integer.parseInt(num3);

for (int i = 0; i < 8; i++){

// Stuck

}

Answer 1

How about that (I skipped exceptions…):

String[] sNums = jTextField1.getText().replaceAll("[^1-9]", "").split("(?<!^)");
int sum = 0;
for (String s : sNums) {
    sum += Integer.parseInt(s); // add all digits
}

while (sum > 9) { // add all digits of the number, until left with one-digit number
    int temp = 0;
    while (sum > 0) {
        temp += sum % 10;
        sum = sum / 10;
    }
    sum = temp;
}