Ripping sprites from Gameloft JAR games

[poumoyboo]

Hi,
I have a Diamond Rush .Jar that i want to extracts sprites from.
I've tried extracting the file with 7zip and there are no image files.
I found that files named 0 ; 1 ; ... are most likely where  the sprites are located but i dont seem to get to them.
Looking for any kind of help.
THANKS GUYS YOU'RE THE BEST

I found sound files but not sprites im a programmer so i know some stuff but i have to find the code for that by extracting all class files

But how I can rip the hidden sprites? I want to see the sprites!