I don't get what my prof mean by this :
-Read one line at a time and place into a new row of a two dimensional array called grades (file that he send me ).
-You can use split to separate the string tokens into a one dimensional array or you can the java tokenizer to separate based on comma delimiter
-In reading the file you will encounter exceptions due to the blank fields.
-create a new .csv file with the same data and a new column that contains the average of the three grades as a double also, the new file should replace all blanks with zeroes.
i'm not asking you guys to created a java program for me rather i need a sample of this ideas. like oracle's sites that explain some of this idea that i still don't get.