Hi, there must be about a dozen ways to do this one. Here are a few. Take a look at the JavaDoc for the classes mentioned and see if any of them sounds fun. These are probably in order from least learning curve to the most, depending on what you already know ...
String.indexOf to find the comma and String.substring the left and right parts.
String.split on a comma delimiter
StringTokenizer with a comma delimiter
Scanner with a comma delimiter - has the advantage that it can convert to int as you pull parts out of the string.