Hi, I'm a new JAVA Programmer and need some help with my homework.  My
homework is a multi-part assignment.

My assignment is to modify the code to find and print the sum of the
same series from 1/2 through 1/n, where n is read in from a data
file.  The file series1.dat which contains a single positive integer,
can be found in the common area of my personal K: drive.   My code
that I have written is not correct.  A lot of error messages occur.

The code to modify:

import java.util.Scanner;
import java.io.*;

public class Summations
{
     public static void main(String[] args) throws IOException
    {
          int value;
          int sumPart = 0;

          // The first part of the text.
          System.out.print("The summation of the series");

        // Loop from 2 to 65536, double value each loop.

          for (value = 2; value <= 65536; value = value * 2)
         {
              sumPart = sumPart + value;

              if (value > 2)
              {
                    System.out.print(" + ");
              }
              System.out.print(" 1/" + value);
         }
     System.out.print(" = 1/" + sumPart + " ");

    // Calculate the results.
    double calced = 1 / (double) sumPart;
    System.out.println("(" + calced + ")");
    }
}

The code that I have written to complete the assignment is:

import java.util.Scanner;
import java.io.*;

public class Summations
{
   public static void main (String[] args) throws IOException
   {
         int n;
         int value;
         int sumPart = 0;
         int number;
         String filename;

        // Create a Scanner object for keyboard input.
        Scanner keyboard = new Scanner(System.in);

       // Get the filename.
       System.out.print("Enter the filename: ");
       filename = keyboard.nextLine();

        // Open the file.
       FileReader freader = new FileReader(filename);
       BufferedReader inputFile = new BufferedReader(freader);

       // Reading data from a file.
       number = inputFile.readInt();

      // Loop from 2 to n, doulbe value each loop.

        for (value = 2; value <= n; value = value * 2)
       {
               sumPart = sumPart + value;

               if (value > 2)
               {
                       System.out.print(" + ");
               }
              System.out.print(" 1/" + value);
       }

      // Print results.
      outputFile.print("The summation of the series");

     System.out.println(" = 1/" + sumPart + " ");

     // Calculate the results
     double calced = 1 / (double) sumPart;
     System.out.println("(" + calced +")");

    // Close the file.
     inputFile.close();
    }
}