Fixed decimal numbers with JAVA

Question

How do I represent numbers in the format

001 = 1
002 = 2
003 = 3
010 = 10
020 = 20

The number of digits is always 3.

Answer 1

Am I missing something obvious here?

String  num_str = "001"
Integer val     = Integer.parseInt(num_str);
String  answer  = val.toString();