java - How can I make a list print out A1-A6, then B1-B6, etc? -

i'm creating vending machine has print out list of options user can enter, problem facing can not print need input item. program gets items print text file. example can print this:

almond joy
mentos
skittles

but need this:

a1: almond joy
a2: mentos
a3: skittles

so on , forth through a6, go on b1-b6, on , forth. how can print out in fashion?

you need generate prefix yourself:

int num_columns = 6;  char rowprefix = 'a'; int colprefix = 1;  scanner s = new scanner("/path/to/file.txt"); while (s.hasnextline()) {     string product = s.nextline();     system.out.println(string.valueof(rowprefix) + colprefix + ": " + product);      colprefix++;     if (colprefix == num_columns) {         colprefix = 1;         rowprefix++;     } }