Question

Is there a better way of getting this result? This function fails if num has more digits than digits, and I feel like it should be in the library somewhere (like Integer.toString(x,’%3d’) or something)

static String intToString(int num, int digits) {     StringBuffer s = new StringBuffer(digits);     int zeroes = digits - (int) (Math.log(num) / Math.log(10)) - 1;      for (int i = 0; i < zeroes; i++) {         s.append(0);     }     return s.append(num).toString(); } 

Answer 1

String.format (https://docs.oracle.com/javase/1.5.0/docs/api/java/util/Formatter.html#syntax)

In your case it will be:

String formatted = String.format('%03d', num); 

• 0 – to pad with zeros
• 3 – to set width to 3