Format an Integer using Java String Format
String.format("%03d", 1) // => "001"// │││ └── print the number one// ││└────── ... as a decimal integer// │└─────── ... minimum of 3 characters wide// └──────── ... pad with zeroes instead of spacesSee java.util.Formatter for more information.
Use %03d in the format specifier for the integer. The 0 means that the number will be zero-filled if it is less than three (in this case) digits.
See the Formatter docs for other modifiers.
If you are using a third party library called apache commons-lang, the following solution can be useful:
Use StringUtils class of apache commons-lang :
int i = 5;StringUtils.leftPad(String.valueOf(i), 3, "0"); // --> "005"As StringUtils.leftPad() is faster than String.format()