Code Help Needed

Code Help Needed

I am trying to help a buddy of mine with this program and I can't seem to figure it out. I am still working on it but any help would be appreciated. The program is suppose to write to and read from a file: student names, scores, make a report, edit and delete data from the file. Right now it compiles but it gives an error at runtime right at the fileOut.write(firstName[test]); line. Again thank you for any help.

import java.util.*;
import java.io.*;
public class finalProjectGradingProgram 
{

   public static void main(String[] args) throws IOException
    {
        Scanner myScanner = new Scanner(System.in);
       File file = new File("studentFile.txt");
       BufferedWriter fileOut = new BufferedWriter(new FileWriter(file));
       BufferedReader fileIn= new BufferedReader(new FileReader("studentFile.txt"));
       BufferedReader dataIn = new BufferedReader(new InputStreamReader(System.in));

        int [][] score = new int[27][50];
        int [] numberOfAssignments = new int[27];
        String [] firstName = new String[27];
        String [] lastName = new String[27];
        int [] studentId = new int[27];

        String end, assignmentTest, searchNumber, scoreTemp, studentIdTemp, empty;
        String restartTemp, numberOfStudentsString, assignmentIndexString, editEntryString;
        int numberOfStudentsTest;
        int i, h, l, p, y, s, entry;
        int firstNameCounter,arrayCounter, arrayCounter2, scoreCounter, scoreCounter2;
        int assignmentTestInt, test;
        int searchNumberInt, searchLoop, index;
        int editLoop, editEntry;
        int assignmentIndex;
        int parseInt = 0;
        int scoreTempInt;
        int restart, restartTest;
        int average, averageTemp;
        int numberOfStudents;
        int emptyFinder;

        empty= "empty";
        end= "end";

//sets all the entrys in array score = -1 for later error checking.
for(arrayCounter = 0; arrayCounter < 26; arrayCounter++)
   {
        for(scoreCounter= 0; scoreCounter < 50; scoreCounter++)
        {
            score[arrayCounter][scoreCounter] = -1;
        }
   }
    for(y=0;y<27;y++)
        {
            firstName[y]= "empty";
        }
    numberOfStudentsTest= 0;

   for(arrayCounter2 = 0; arrayCounter2 < 26; arrayCounter2++)
    {
           studentId[arrayCounter2]= fileIn.read();
           firstName[arrayCounter2]= fileIn.readLine();
           lastName[arrayCounter2]= fileIn.readLine();
           numberOfAssignments[arrayCounter2]= fileIn.read();

    for(scoreCounter2= 0; scoreCounter2 < 50; scoreCounter2++)
            {
            score[arrayCounter2][scoreCounter2] = fileIn.read();
        }
      }
    numberOfStudentsTest=fileIn.read();

restart=4;

entry = 0;
while(entry > 0 && entry < 5)
{
    System.out.println("If you wish to add a student please press 1");
    System.out.println("If you wish to modify a student please press 2");
    System.out.println("If you wish to delete a student please press 3");
    System.out.println("If you wish to run a report on a student please press 4");
    System.out.println("If you wish to end the program please press 5");
    //entry = dataIn.readLine();
    //parseInt = Integer.parseInt(entry);
    entry = myScanner.nextInt();
    numberOfStudentsTest = 0;

//start of the menu system. I still need to work on the modify and delete portions.
//the if statement works in conjunction with the menu
if(parseInt == 1)
{
   System.out.println("Please enter the amount of students you wish to add");
   numberOfStudentsString = dataIn.readLine();
   numberOfStudents = Integer.parseInt(numberOfStudentsString);
   //This asks the user to enter the number of students they wish to add allowing them to effectivly end the loop with out the need to break it. 
       for(i=(0); i < (numberOfStudents); i++)
       //The for loop is to run though it 26 times. This needs to be edited to ask for or find where the teacher left off last time. It will also systematiclly fill in the arrays.
        {
           System.out.println("Please enter student's last name, Enter end to quit:");
           lastName[i]=(String) dataIn.readLine();
                   if (lastName[i].equals(end))
                   {
                        break;
                   }
           System.out.println("Please enter student first name, Enter end to quit:");
           firstName[i]=(String) dataIn.readLine();
                  if (firstName[i].equals(end))
                   {
                        break;
                   }
           System.out.println("Please enter the student ID number, Enter -5 to quit:");
           studentIdTemp = dataIn.readLine();  
           studentId[i]= Integer.parseInt(studentIdTemp);
                   if(studentId[i] == -5)
                   {
                       break;
                   }
        for (h = 0; h<25;h++)
        {
           System.out.println("Please enter student "+ (h+1) +" assignment score, Enter -5 to quit:");
           assignmentTest = dataIn.readLine();
           assignmentTestInt = Integer.parseInt(assignmentTest);
                if(assignmentTestInt == -5)
                {
                   break;
                }
                else
                {
                    score[i][h] = assignmentTestInt;
                    numberOfAssignments[i] = h+1;
                }
        }
          numberOfStudentsTest= (numberOfStudentsTest+1);
       }

}//if

if(parseInt == 2)
{
    System.out.println("Please enter the students ID");
    searchNumber = dataIn.readLine();
    searchNumberInt = Integer.parseInt(searchNumber);
        for(searchLoop=0; searchLoop < 26; searchLoop++)
          {
            if(searchNumberInt == studentId[searchLoop])
                {
                  index = searchLoop;
                  break;
                }
          }
    index = searchLoop;
    System.out.println("Found Student");
    System.out.println("Current Student Information");
    System.out.println(studentId[index]);
    System.out.println(firstName[index]);
    System.out.println(lastName[index]);
    System.out.println(numberOfAssignments[index]);
        for(editLoop=0;editLoop < numberOfAssignments[index+1]; editLoop++)
        {
            System.out.print(score[index][editLoop]);
        }
    System.out.println("What would you like to do?");
    System.out.println("Enter 1 to edit student ID");
    System.out.println("Enter 2 to edit First Name");
    System.out.println("Enter 3 to edit Last Name");
    System.out.println("Enter 4 to edit Scores");
    editEntryString = dataIn.readLine();
    editEntry = Integer.parseInt(editEntryString);
     if(editEntry == 1)
     {
         System.out.println("Please enter the new student ID");
         studentIdTemp= dataIn.readLine();
         studentId[index]= Integer.parseInt(studentIdTemp);
     }
     if(editEntry == 2)
     {
         System.out.println("Please enter the new first name of the student");
         firstName[index] = dataIn.readLine();
     }
     if(editEntry == 3 )
     {
         System.out.println("Please enter the new last name of the student");
         lastName[index] = dataIn.readLine();
     }
     if(editEntry == 4)
     {
         System.out.println("Please enter the number of the assignment you would like to edit");
         assignmentIndexString = dataIn.readLine();
         assignmentIndex = Integer.parseInt(assignmentIndexString);
         assignmentIndex = (assignmentIndex - 1);
         System.out.println("Please enter the new score for the assignment");
         score[index][assignmentIndex]=dataIn.read();
     }
}
if(parseInt == 3)
{
    System.out.println("Please enter the students ID");
    searchNumber = dataIn.readLine();
    searchNumberInt = Integer.parseInt(searchNumber);
        for(searchLoop=0; searchLoop < 26; searchLoop++)
          {
            if(searchNumberInt == studentId[searchLoop])
                {
                  index = searchLoop;
                  break;
                }
          }
    index = searchLoop;
    firstName[index] = " ";
    lastName[index] = " ";
    studentId[index] = -1;
    numberOfAssignments[index] = -1;

    for(p=0;p<25;p++)
    {
        score[index][p]= -1;
    }

}

if(parseInt == 4)
{
    System.out.println("Who do you wish to run the report for?");
    System.out.println("Please enter the students ID");
    searchNumber = dataIn.readLine();
    searchNumberInt = Integer.parseInt(searchNumber);
        for(searchLoop=0; searchLoop < 26; searchLoop++)
          {
            if(searchNumberInt == studentId[searchLoop])
                {
                  index = searchLoop;
                  break;
                }
          }
    index = searchLoop;
    System.out.println(firstName[index]);
    System.out.println(lastName[index]);
    System.out.println(studentId[index]);
    System.out.println(numberOfAssignments[index]);

    for(int q=0;q<numberOfAssignments[index];q++)
    {
        System.out.print(score[index][q] + " ");
    }
        averageTemp = 0;
    for(int j=0;j < numberOfAssignments[index];j++)
    {
        averageTemp= averageTemp + score[index][j];
    }      
    average=0;
    //Seems to just skip over this section entirely. I have no idea why.
    average = averageTemp/numberOfAssignments[index];
    System.out.println(average);
}
if(parseInt == 5)
{
    System.exit(0);
}
   System.out.println("Would you like to restart the program? If you wish to restart enter the number 4");
   restartTemp= dataIn.readLine();
   restartTest = Integer.parseInt(restartTemp);
   restart= restartTest;
}//while for menu
  for(test=0;test<50;test++)
{

    fileOut.write(studentId[test]);
    fileOut.write(firstName[test]);
    fileOut.write(lastName[test]);
    fileOut.write(numberOfAssignments[test]);
        for(l=0;l<50;l++)
        {
             fileOut.write(score[test][l]);
        }
}
    fileOut.write(numberOfStudentsTest);
    fileOut.close();
   }
}
View Answers

December 9, 2011 at 11:42 AM


December 9, 2011 at 8:38 PM

Thank you that is very good but I need a plain text version of it. I messed around last night with it and here is what I have so far. It still won't write to a file and the rest of the menu will not work without that. Any help is greatly appreciated

import java.util.*;
import java.io.*;
public class Test
{
   public static void main(String[] args) throws IOException
    {
       Scanner myScanner = new Scanner(System.in);
       File file = new File("studentFile.txt");
       BufferedWriter fileOut = new BufferedWriter(new FileWriter(file));
       BufferedReader fileIn= new BufferedReader(new FileReader("studentFile.txt"));
       BufferedReader dataIn = new BufferedReader(new InputStreamReader(System.in));

        //creating arrays
        int [][] score = new int[27][50];
        int [] numberOfAssignments = new int[27];
        String [] firstName = new String[27];
        String [] lastName = new String[27];
        int [] studentId = new int[27];

        //declaring variables
        String end, assignmentTest, searchNumber, scoreTemp, studentIdTemp, empty, response;
        String restartTemp, numberOfStudentsString, assignmentIndexString, editEntryString;
        int numberOfStudentsTest;
        int i, h, l, p, y, s, entry;
        int firstNameCounter,arrayCounter, arrayCounter2, scoreCounter, scoreCounter2;
        int assignmentTestInt, test;
        int searchNumberInt, searchLoop, index;
        int editLoop, editEntry, assignmentIndex;
        int parseInt = 0;
        int scoreTempInt, restart, restartTest;
        int average, averageTemp, numberOfStudents, emptyFinder;

        empty= "empty";
        end= "end";

        //sets all the entrys in array score = -1 for later error checking.
    for(arrayCounter = 0; arrayCounter < 26; arrayCounter++)
    {
        for(scoreCounter= 0; scoreCounter < 50; scoreCounter++)
        {
            score[arrayCounter][scoreCounter] = -1;
        }
    }
    for(y=0;y<27;y++)
        {
            firstName[y]= "empty";
        }
    numberOfStudentsTest= 0;
    for(arrayCounter2 = 0; arrayCounter2 < 26; arrayCounter2++)
    {
          studentId[arrayCounter2]= fileIn.read();
          firstName[arrayCounter2]= fileIn.readLine();
          lastName[arrayCounter2]= fileIn.readLine();
          numberOfAssignments[arrayCounter2]= fileIn.read();
    for(scoreCounter2= 0; scoreCounter2 < 50; scoreCounter2++)
      {
         score[arrayCounter2][scoreCounter2] = fileIn.read();
      }
      }
    numberOfStudentsTest=fileIn.read();
   restart=1;
entry = 1;  
//creating menu
while(entry > 0 && entry < 5)
{
        System.out.println("*********");
        System.out.println("Main Menu");
        System.out.println("*********");
        System.out.println("Option 1: Add a student");
        System.out.println("Option 2: Modify a student");
        System.out.println("Option 3: Delete a student");
        System.out.println("Option 4: Run a report");
        System.out.println("Option 5: End Program");
        entry = myScanner.nextInt();

        numberOfStudentsTest = 0;

//start of the menu system. 
//the if statement works in conjunction with the menu
//Menu Option 1
if(entry == 1)
{
   System.out.println("Please enter the amount of students you wish to add");
   numberOfStudentsString = dataIn.readLine();
   numberOfStudents = Integer.parseInt(numberOfStudentsString);
   //This asks the user to enter the number of students they wish to add allowing them to effectivly end the loop with out the need to break it. 
       for(i=(0); i < (numberOfStudents); i++)
       //The for loop is to run though it 26 times. It will also systematiclly fill in the arrays.
        {
           System.out.println("Please enter student's last name, or Enter end to quit:");
           lastName[i]=(String) dataIn.readLine();
                   if (lastName[i].equals(end))
                   {
                        break;
                   }
           System.out.println("Please enter student first name, or Enter end to quit:");
           firstName[i]=(String) dataIn.readLine();
                  if (firstName[i].equals(end))
                   {
                        break;
                   }
           System.out.println("Please enter the student ID number, or Enter -5 to quit:");
           studentIdTemp = dataIn.readLine();  
           studentId[i]= Integer.parseInt(studentIdTemp);
                   if(studentId[i] == -5)
                   {
                       break;
                   }
            for (h = 0; h<25;h++)
            {
            System.out.println("Please enter student "+ (h+1) +" assignment score, Enter -5 to quit:");
            assignmentTest = dataIn.readLine();
            assignmentTestInt = Integer.parseInt(assignmentTest);
                if(assignmentTestInt == -5)
                {
                    break;
                }
                else
                {
                    score[i][h] = assignmentTestInt;
                    numberOfAssignments[i] = h+1;
                }
            }
            numberOfStudentsTest= (numberOfStudentsTest+1);
       }

}

//Menu Option 2
if(entry == 2)
{
    System.out.println("Please enter the students ID");
    searchNumber = dataIn.readLine();
    searchNumberInt = Integer.parseInt(searchNumber);
        for(searchLoop=0; searchLoop < 26; searchLoop++)
            if(searchNumberInt == studentId[searchLoop])
                {
                  index = searchLoop;
                  break;
                }
    index = searchLoop;
    System.out.println("Found Student");
    System.out.println("Current Student Information");
    System.out.println(studentId[index]);
    System.out.println(firstName[index]);
    System.out.println(lastName[index]);
    System.out.println(numberOfAssignments[index]);
        for(editLoop=0;editLoop < numberOfAssignments[index+1]; editLoop++)
        {
            System.out.print(score[index][editLoop]);
        }
     //Creating editing menu
     System.out.println("*********");
     System.out.println("Edit Menu");
     System.out.println("*********");
    System.out.println("Option 1: Edit student ID");
    System.out.println("Option 2: Edit First Name");
    System.out.println("Option 3: Edit Last Name");
    System.out.println("Option 4: Edit Scores");
    editEntryString = dataIn.readLine();
    editEntry = Integer.parseInt(editEntryString);
     if(editEntry == 1)//input option 1
     {
         System.out.println("Please enter the new student ID");
         studentIdTemp= dataIn.readLine();
         studentId[index]= Integer.parseInt(studentIdTemp);
     }
     if(editEntry == 2)//input option 2
     {
         System.out.println("Please enter the new first name of the student");
         firstName[index] = dataIn.readLine();
     }
     if(editEntry == 3 )//input option 3
     {
         System.out.println("Please enter the new last name of the student");
         lastName[index] = dataIn.readLine();
     }
     if(editEntry == 4)//input option 4
     {
         System.out.println("Please enter the number of the assignment you would like to edit");
         assignmentIndexString = dataIn.readLine();
         assignmentIndex = Integer.parseInt(assignmentIndexString);
         assignmentIndex = (assignmentIndex - 1);
         System.out.println("Please enter the new score for the assignment");
         score[index][assignmentIndex]=dataIn.read();
     }
}

//Menu Option 3
if(entry == 3)
{
    System.out.println("Please enter the students ID");
    searchNumber = dataIn.readLine();
    searchNumberInt = Integer.parseInt(searchNumber);
        for(searchLoop=0; searchLoop < 26; searchLoop++)
            if(searchNumberInt == studentId[searchLoop])
                {
                  index = searchLoop;
                  break;
                }
     //replace with blank spaces and -1 where appropriate
    index = searchLoop;
    firstName[index] = " ";
    lastName[index] = " ";
    studentId[index] = -1;
    numberOfAssignments[index] = -1;

    for(p=0;p<25;p++)
    {
        score[index][p]= -1;
    }

}

//Menu Option 4
if(entry == 4)
{
    System.out.println("Who do you wish to run the report for?");
    System.out.println("Please enter the students ID");
    searchNumber = dataIn.readLine();
    searchNumberInt = Integer.parseInt(searchNumber);
        for(searchLoop=0; searchLoop < 26; searchLoop++)
            if(searchNumberInt == studentId[searchLoop])
                {
                  index = searchLoop;
                  break;
                }
    index = searchLoop;
    System.out.println(firstName[index]);
    System.out.println(lastName[index]);
    System.out.println(studentId[index]);
    System.out.println(numberOfAssignments[index]);
    for(int q=0;q<numberOfAssignments[index];q++)
    {
    System.out.print(score[index][q] + " ");
    }
    averageTemp = 0;
    for(int j=0;j < numberOfAssignments[index];j++)
    {
        averageTemp= averageTemp + score[index][j];
    }      
    average=0;
    //Seems to just skip over this section entirely. I have no idea why.
    average = averageTemp/numberOfAssignments[index];
    System.out.println(average);
}

//Menu Option 5
if(entry == 5)
{
    System.exit(0);
}
   System.out.println("Would you like to restart the program? If you wish to restart enter the number 4");
   restartTemp= dataIn.readLine();
   restartTest = Integer.parseInt(restartTemp);
   restart= restartTest;
}//close while loop for main menu
   for(test=0;test<50;test++)
    {

    fileOut.write(studentId[test]);
    fileOut.write(firstName[test]);
    fileOut.write(lastName[test]);
    fileOut.write(numberOfAssignments[test]);
        for(l=0;l<50;l++)
        {
             fileOut.write(score[test][l]);
        }
    }
        fileOut.write(numberOfStudentsTest);
        fileOut.close();
   }
}









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Plz help me in writing the code   Write a two user Chess Game. (users must be on different systems
Plz help me in writing the code - Java Beginners
Plz help me in writing the code   Write a two user Chess Game. (users must be on different systems
please help me to write a code for this program
please help me to write a code for this program   1 1 1 1 2 2 1 1 3 4 3 1 1 4 7 7 4 1
please help me to write a code for this program
please help me to write a code for this program   1 1 1 1 2 1 1 3 3 1 1 4 6 4 1
PLZ HELP ME. i need php code.
PLZ HELP ME. i need php code.   I want php code for bellow OUTPUT. output is just example but it must be letters only. abc bcd efg jku rgt azs hje qqc wws adt
Not sure whats wrong with my code HELP PLEASE?!?!
Not sure whats wrong with my code HELP PLEASE?!?!  I cant figure out what I am doing wrong in my code can anyone help me out??? Grades ADS_TO_REPLACE_1 function computeGrade( ) { var hw, lab, midt, fin, avg; hw
Help on this java code for online library search
Help on this java code for online library search   I have written the following java code for simple library book search. but its having some errors ... please help me on this code. import java.sql.*; import java.awt.
please help me to give code - Java Beginners
please help me to give code  Write a function, sliding(word, num)that behaves as follows. It should print out each slice of the original word having length num, aligned vertically as shown below. A call to sliding(examples, 4
please help me to give code - Java Beginners
please help me to give code  Write a function with a signature cheerlead(word) that prints a typical cheer as follows. The word robot: Gimme an R Gimme an O Gimme a B Gimme an O Gimme a T What did you give me? ROBOT
Please help me fix this code - MobileApplications
Please help me fix this code   Please help me in this area of code... in the background of the forms in this code i want to sum all expenses amount...); //*********************************************This code section is for List All Trip Expenses Screen
Please help me to modify my java code from php code
]; } } I tried like this (see below JSP code) ... but this is not giving me the exact result as the above PHP code is giving. So please help me to convert...Modify Java code from PHP Code  i want to covert this php code int
Can anybody help me with this simple MySql code
Can anybody help me with this simple MySql code  select c.countryid, r.bp, r.sp, c.country, t.timee from rate as r, countryloc as c, todaysrate as t... cad 2013-03-16 18:26:31 can any one help me with the query because i want
please help me to give code - Java Beginners
please help me to give code  Write a program that prints an n-level stair case made of text. The user should choose the text character and the number of stairs in the stair case * ** *** ****   Hi friend
please help me to give code - Java Beginners
please help me to give code  Write a program that uses loops to generate an n x n times table. The program should get n from the user. As a model here is a 4 x4 version: | 1 2 3 4
need help to remove and optimise the code for creating a page
need help to remove and optimise the code for creating a page   i have the following code but it has some sorts of error whenever i run the page after validation through javascript it calls for the servlets and then i tried
please help me to give code - Java Beginners
please help me to give code  Write a program that reads a file named famous.txt and prints out the line with the longest length. In the case of a tie, you may print out only one of them. For example in the file: Alan Turing
Please help me to modify my java code from php code
Please help me to modify my java code from php code  i want to covert this php code int java/JSP . if (isset($_POST['orders'])) { $orders...]); $array[] = $item[1]; } } I tried like this (see below JSP code

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