Reading file anf using input for main

Question

Hello Amigos,
I have the following code but I have my doubts if it will work for what I want. I want to read in a file that will call a method with specific arguments.
Example:
Method:
addTwoNumbers(int oneNum, int twoNum);
File: sum.txt:
addTwoNumbers(1,5);
addTwoNumbers(8,2);
addTwoNumbers(3,10);
My confusion starts with the PrintWriter definition. I am not quite sure how to implement it and I don't find an example or online reference about this topic.
Thanks in advance...
try
            BufferedReader fileIn  = new BufferedReader( new FileReader("process.txt"));
            String oneLine;
            System.out.println("Reading File...");
          while( ( oneLine = fileIn.readLine( ) ) != null )
               PrintWriter printWriter = new PrintWriter(new OutputStreamWriter(fileIn.readLine()));
                  printWriter.println(oneLine);
                  printWriter.close();
                  System.out.flush();
             System.out.println("Done Reading File.");
        }

Answer 1

It's hard to tell where to start. I'll post a brief example of how to read something in from a text file and use it. It's not robust, but it serves as a starting point, I suppose.
sum.txt
1,3
2,4
5,6
SumDemo.javaimport java.io.*;
public class SumDemo
    public static void main(String[] args)
        new SumDemo().go();
    public void go()
        String fileName = "sum.txt";
        try {
            BufferedReader in = new BufferedReader(new FileReader(fileName));
            String line;
            while ((line = in.readLine()) != null)
                String[] nums = line.split(",");
                int x = Integer.parseInt(nums[0]);
                int y = Integer.parseInt(nums[1]);
                System.out.println(addTwoInts(x, y));
        catch (IOException ioe) { ioe.printStackTrace(); }
    public int addTwoInts(int x, int y)
        return x + y;
}