Java Programming

Hi, I have searched for topic like this and have not been able to find exactly what I am looking for. I am very new to Java and I am looking for a way to read in a *.csv file into an array list and have each value stored to a column in the array list. For instance, I want to save a list of unknown length to different fields in the array list

a,1
b,2
c,3
d,4...

I am able to read in each line to the list, but I would like to save each char to its own field in that row. I hope that I am making sense and that my terminology is explaining my issue correctly. Thank you in advance.