help me understand this small code please

[Haythem Ben Yahia]

hi,
i found this code in a practice exam but even i tested it in Eclipse, i didn't find how it works.
please can someone explain me what this 1$+10d %.....

 import java.io.*; 
 import java.util.*; 
 import static java.lang.Short.*; 
 import static java.lang.Long.*; 
  public class MathBoy { 
     public static void main(String[] args) { 
       long x = 123456789; 
       short y = 22766;  // maximum value of a short is 32767 
        System.out.printf("%1$+10d %2$010d ", x, MAX_VALUE - y); 
        System.out.println(new Date()); 
     } 
  }  

help please!!!

[Guy Buyle]

Hi,

The following line contain print formattings:

System.out.printf("%1$+10d %2$010d ", x, MAX_VALUE - y);

Format specifiers begin with a percent sign (%) and end with a converter. The converter is a character indicating the type of argument to be formatted. In between the percent sign (%) and the converter you can have optional flags and specifiers.

%[argument_index$][flags][width][.precision]conversion

The optional argument_index is a decimal integer indicating the position of the argument in the argument list. The first argument is referenced by "1$", the second by "2$", etc.

The optional flags is a set of characters that modify the output format. The set of valid flags depends on the conversion.

The optional width is a non-negative decimal integer indicating the minimum number of characters to be written to the output.

The optional precision is a non-negative decimal integer usually used to restrict the number of characters. The specific behavior depends on the conversion.

The required conversion is a character indicating how the argument should be formatted. The set of valid conversions for a given argument depends on the argument's data type.