date conversion and performance questions

Hi -- basically a newbie here learning Java and the Toolbox so have
patience...

I'm retrieving data from an iSeries file using JDBC with the end result to
display in a browser.  There are a couple date fields in the file with the
data in yymmdd format, the fields are 6,0.  I need to convert these dates
to display in mmddyy format in the browser.  There is an RPGLE routine we
use in other cases that converts from *YMD to *USA format.  I've been
looking at either calling that RPGLE program from my Java program, using
the DateTimeConverter class from the toolbox, or using Java to manipulate
the date as a string.  I can probably figure out how to do all three but I
do have a couple questions:

My first being what are the performance implications of the three options
I'm considering ?

Regarding calling an RPG program from Java, how should I format the parm to
be input to the RPGLE as a 6,0 value ?

Similar question regarding using the DateTimeConverter class -- I have a
String containing the yymmdd value in my Java program.  How should I format
that to be a valid input to the DateTimeConverter class?

Thanks in advance...


Bob