Is there is a way to reformate integer number to specific formate?

Question

I need to reformate integer to be four letters in length by adding zeros to the left of that integers value like "435" to "0435"

and "2" to "0002"

i can do it by playing a game with if and else cases... but Is theres is a better way to do that ?

`while (n.length() < 4) { n = '0'+n;}` (where `n` is the integer in `String` form) would be one possible way. — Kevin Anderson, Jun 26 '20 at 03:17
Just for fun, as an alternative to `String.format`: `("0000" + input).substring(input.length());` — Tim Biegeleisen, Jun 26 '20 at 03:20

score 0 · Answer 1 · answered Jun 26 '20 at 03:17

0

Use String.format

String filledZeros = String.format("%04d", yourNumber);

answered Jun 26 '20 at 03:17

Brian H.

1,480
8
15

score 0 · Answer 2 · answered Jun 26 '20 at 03:17

Hopefully this is useful

  int number = 15;
  String numberAsString = String.valueOf(number);
  StringBuilder sb = new StringBuilder();
  while(sb.length()+numberAsString.length()<10) {
     sb.append('0');
  }
  sb.append(number);
  String paddedNumberAsString = sb.toString();
  System.out.println(paddedNumberAsString);

Is there is a way to reformate integer number to specific formate?

2 Answers2