Hi how to read lines in a text file???

Question

Hi experts
please help me out
i wanna read a file which contaning students id and name.
such as
211 john
122 david
111 Chris
and so on.
i know how to read using bufferedreder but the problem is
my teacher is gonna change the number of students in the file
when she marks my code....
so i don't know how many lines(students) will it be.in the file.....
in this case, how to read a file?? i don't know how many lines will it be..
but i know the maximum students in the file is 20.
how to do it with this..........................
experts~ please help me~~~

Answer 1

try this
try {
            FileReader reader = new FileReader(f);
            BufferedReader bufferedReader = new BufferedReader(reader);
            line = bufferedReader.readLine();
            while (line !=null) {
                line = bufferedReader.readLine();
            bufferedReader.close();
            reader.close();
        catch(IOException e) {
            String msg = new String("Error Reading " + f + " data file");
            throw new OpenFileException(msg);
        }