social security number pattern question

[jmoore2416]

Using Jaspersoft Studio 6.20.6, I am formatting an integer field containing social security number with the following pattern:

000-00-0000

The social security number to output is 999999999.  I am expecting formatted output to be 999-99-9999.  The report output comes as 999999999--.

Why does this not work?  

 

 

[jmoore2416]

Created a variable sssno to convert the integer to string and used this - 

$V{sssno}.substring( 0, 3) +"-" + $V{sssno}.substring( 3, 5) + "-" + $V{sssno}.substring( 5, 9)

Kinda ugly but solves the problem.  moving on.