Need homework help

ttp://mars.walagata.com/w/miachan/FutureValueApp.java Is my assignment

I have to..

3. After the code that calculates, formats, and sisplays the results for each calculation, add code that stores the formatted values as strings in the next row of the array ( you need to use the toString method of the integer class to store the years value )

How in the WORLD do I go about doing this? It's a problem form Murach Beginning Java 2 JDK 5..I've been struggling through the class as i'm really really new to programming...and I really don't get it at all..

What I don't understand is..Like, how to make the first set of values (inv/mo) go into the first row, first column ( [0,0] ) and the other for values into each subsequent column, and switch to the next row, for up to 10 rows, each time the program runs.