I\'m new to java and trying to create a program for an asssignment. It compiles,

ID: 3567721 • Letter: I

Question

I'm new to java and trying to create a program for an asssignment. It compiles, but I keep getting an exception in thread error. here is the program:

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

public class grades {

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

    Scanner input = new Scanner(System.in);

      // Define file names
      final String INPUT_FILE = "grades.txt";
       final String OUTPUT_FILE = "grades.txt";

      int grade;
      String name = " ";
      double value = 0;
      String msg = " ";
      String line = " ";
      String filename = "ShelbyHarms_3_08_Input.txt";

       // Access the input/output files
      File inputDataFile = new File(INPUT_FILE);
       Scanner inputFile = new Scanner(inputDataFile);
       FileWriter outputDataFile = new FileWriter(OUTPUT_FILE);
       PrintWriter outputFile = new PrintWriter(outputDataFile);
      System.out.println("Reading file " + INPUT_FILE + " " +
                           "Creating file " + OUTPUT_FILE);

      // Read all of the values from the file
      while (inputFile.hasNext() ) {
       grade = inputFile.nextInt();
       name = inputFile.nextLine();
       name = name.trim();

     } // End while

      if(value >= 90)
          {
          msg = "OUTSTANDING";
          }
          else if (value >= 70)
          {
          msg = "Satisfactory";
          }

          if(value >= 90){
               msg = "OUTSTANDING";
     }else{
     if(value >= 70){
                    msg = "Satisfactory";

     }else
                    msg = "FAILING";
              }

          outputFile.println(value + " " + name + " " + msg);
          outputFile.println("processed names");
          outputFile.println("between 70 and 89 inclusive");
          outputFile.close();

       } // End outputResults
} // End class

Here is the error:

Reading file grades.txt
Creating file grades.txt
Exception in thread "main" java.util.InputMismatchException
   at java.util.Scanner.throwFor(Scanner.java:864)
   at java.util.Scanner.next(Scanner.java:1485)
   at java.util.Scanner.nextInt(Scanner.java:2117)
   at java.util.Scanner.nextInt(Scanner.java:2076)
   at grades.main(grades.java:42)

The Input file is this:

Data to use in this order:

------------------------------------

70 Light Karen L

99 Fagan Bert Todd

60 Antrim Forrest N

73 Camden Warren

80 Mulicka Al B

99 Lee Phoebe

75 Bright Harry

92 Garris Ted

83 Benson Martyne

71 Lloyd Jeanine D

43 Leslie Bennie A

40 Brandt Leslie

100 Schulman David

51 Worthington Dan

60 Hall Gus W

60 Prigeon Dale R

96 Fitzgibbons Rusty

Explanation / Answer

As I said .... the grade and name are in the same line.

So you need to read the line and split it when tab occurs, here's the correct while loop

Also this just removes you error....but i think you code is wrong somewhere....post the exact question if you want hlp with it. Hope it helps!

while (inputFile.hasNext() ) {
String lines=inputFile.nextLine();
String[] words=lines.split(" ");
grade=Integer.parseInt(words[0]);
name=words[1];
name = name.trim();

} // End while

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