import java.io.*;

class SumFile {

  public static void main (String[] args) throws Exception {

      // Make a connection to the data file "numbers.dat"
         FileReader fr = new FileReader("numbers.dat");
         BufferedReader br = new BufferedReader(fr);

      // Initialize sum
         int sum = 0;

      // Read the first String from the file
         String inputString = br.readLine();

      // while the end of the file has not been reached...
         while (inputString != null) {

            // ...convert the String to a number
               int num = Integer.parseInt(inputString);

            // ...add the number to the total so far
               sum = sum + num;

            // ...read the next line 
               inputString = br.readLine();
         }

      // Display the final total
         System.out.println("Sum = " + sum);

   } // end main

 } // end class