You don't need arraylists for displaying. Just simply use the arraylist of customer, that you already have. If you are still unsure of what you need to do, then please clarify the problem even more, and post a small bit of compilable and runnable code (not the whole program if this can be avoided).
i was asking i there was another way then using an arraylist with arrays to display it easly into (for exemple) in a textarea. If there is an easier way to add new customers to the program using the arraylist.