Java help

Hey /prog/, I haven't been here in a while and I was wondering if you guys could offer some basic programming help.

I'm writing a program that parses integers and returns the word, i.e. 100 yeilds "one hundred." Obviously I'm not going to post all of the code. I'm only having trouble implementing this one method.

//Return any single digit of the instance variable
//Parameter index gives the position of the required digit
//index 0 indicates the least significant digit
//Example: 7046
//Digit-0 = 6, Digit-1 = 4, Digit-2 = 0, Digit-3 = 7
//All higher-indexed (4, 5, 6, ...) digits are 0
//A RuntimeException is thrown if parameter index < 0
//
public int getDigit(int index)
{
  String numStr = Integer.toString(this.number);
  if(index < 0)
    throw new RuntimeException("Invalid index");
  else //wtf do I do?
}//end of getDigit

this.number is a private class instance variable

What throws me off is that the indexes are backwards.
tl;dr noob needs java help

>>1
Please, fuck off, we had too much ``plz halp'' threads. Go to /g/ and ask them.

>>2
OP here: I already asked /g/ that's why I'm here. :(

Why so angry?

>>1
public static int getDigit(int number, int index) {
  if (index == 0)
    return number%10;
  else
    return getDigit(number/10, index-1);
}

>>3
Scroll the frontpage and see how much shitstorm we already had today.

Your getDigit seems pointless, you could just return (the indexth digit of this.number).toString(). You could get it by using integer division, modulo and a loop.

>>5
You could get it by using integer division, modulo and a loop.
>>4
Ok, thread over.

>>4
Prettified for Javatards:

public int getDigit(int index) {
   if (index < 0) throw new RuntimeException("Invalid index");
   int n = this.number;
   while(index-->=0) n/=10;
   return n%10;
}

Thanks guys. I didn't mean to bother about homework help. In truth, I haven't been on 4chan in well over a year.

>>8
In truth, we are not part of ``4chan'' and abhor the imageboards.

riders of the /prog/

>>7

; ((and/c rational? inexact?) exact-integer? . -> . integer?)
(define (get-digit m n) (remainder (round (/ m (expt 10 n))) 10))

(define x 123.221)
(define y -123.332)
(get-digit x 0) ; 3
(get-digit x 1) ; 2
(get-digit x -1) ; 2
(get-digit y 0) ; -3
(get-digit y -1) ; -3
(get-digit y -4) ; 0, because the -4th position IS zero.
(get-digit y 4) ; same