Search:

What data goes in the columns on a row? How can the program get that data from the objects?
The way the code is written, the class needs to have a method that takes an int value (j) and returns...

One way would be to use a loop. What was the problem you had?

Why take the data out of the class object? Is there a problem working with an arraylist?
There are other util classes and methods that can be used with arraylists.