Left padding numbers with zeros

Source:

public class LeftPadding {
   public static void main(String[] args) {

      int n1 = 1;
      int n2 = 22;
      int n3 = 333;
      int n4 = 4444;

      // zero padding with length 5
      System.out.println( String.format("%05d", n1) );
      System.out.println( String.format("%05d", n2) );
      System.out.println( String.format("%05d", n3) );
      System.out.println( String.format("%05d", n4) );
   }
}

Output:

   $ java LeftPadding 
   00001
   00022
   00333
   04444