Hello

I have an assignment where I have to create a try statement that creates a BufferedReader and BufferedWriter assigned to particular file types - I have no problem with this.

I then have to define a method called 'run' which uses a StreamTokenizer to processes the contents of the file. A '+' symbol has to be added in front of each of the numbers in the file read by BufferedReader and then a '=' and the total of the numbers be printed out.

This is my code:

import java.io.*;

import java.util.*;

import java.lang.*;

public class Adder {

public static BufferedWriter output;

public static BufferedReader input;

public static StreamTokenizer tok;

public Adder (BufferedWriter output, BufferedReader input, StreamTokenizer tok) {}

public static void main(String[] args) {

BufferedWriter output;

BufferedReader input;

StreamTokenizer tok;

try

{

File inputFile = new File("c:/JavaProjects/TMA01/Streams/MyInputFile.txt");

File outputFile = new File("c:/JavaProjects/TMA01/Streams/MyOutputFile.txt");

input = new BufferedReader (new FileReader(inputFile));

output = new BufferedWriter (new FileWriter(outputFile));

}

catch (Exception e) {System.exit(0);

}

}

public static void run (){

double total = 0;

StreamTokenizer tok = new StreamTokenizer(input);

try {

while (tok.nextToken()!=tok.TT_EOF) {
total = (total + tok.nval);

output.write("+ " + tok.nval);

}

int c;

output.write("= " + total);

output.flush();

output.close();

}catch (IOException e) {System.exit(0);}

}

}

I am obviously doing something very wrong as my output file is created but completely empty.

Can anyone point me in the right direction ?

Thanks

Maggi