Question

Must be written in JAVA Code

Write a program that will read in a file of student academic credit data and create a list of students on academic warning. The list of students on warning will be written to a file. Each line of the input file will contain the student name (a single String with no spaces), the number of semester hours earned (an integer), the total quality points earned (a double). The following shows part of a typical data file:

Smith 27 83.7

Jones 21 28.35

Walker 96 182.4

Doe 60 150

The program should compute the GPA (grade point or quality point average) for each student (the total quality points divided by the number of semester hours) then write the student information to the output file if that student should be put on academic warning. A student will be on warning if he/she has a GPA less than 1.5 for students with fewer than 30 semester hours credit, 1.75 for students with fewer than 60 semester hours credit,and 2.0 for all other students. The file Warning.java contains a skeleton of the program. Do the following:

Set up a Scanner object scan from the input file and a PrintWriter outFile to the output file inside the try clause (see the comments in the program). Note that you’ll have to create the PrintWriter from a FileWriter,but you can still do it in a single statement.

Inside the while loop add code to read and parse the input get the name, the number of credit hours, and the number of quality points. Compute the GPA, determine if the student is on academic warning, and if so write the name, credit hours, and GPA (separated by spaces) to the output file.

After the loop close the PrintWriter.

Think about the exceptions that could be thrown by this program: • A FileNotFoundException if the input file does not exist • A NumberFormatException if it can’t parse an int or double when it tries to - this indicates an error inthe input file format • An IOException if something else goes wrong with the input or output stream Add a catch for each of these situations, and in each case give as specific a message as you can. The program will terminate if any of these exceptions is thrown, but at least you can supply the user with useful information.

Test the program. Test data is in the file students.txt. Be sure to test each of the exceptions as well.

students.txt

Smith 27 83.7
Jones 21 28.35
Walker 96 182.4
Doe 60 150
Wood 100 400
Street 33 57.4
Taylor 83 190
Davis 110 198
Smart 75 2 92.5
Bird 84 168
Summers 52 83.2

Warning.java

// ************************************************************************
// Warning.java
//
// Reads student data from a text file and writes data to another text file.
// ************************************************************************
import java.util.Scanner;
import java.io.*;
public class Warning
{
        // -------------------------------------------------------------------
        // Reads student data (name, semester hours, quality points) from a
        // text file, computes the GPA, then writes data to another file
        // if the student is placed on academic warning.
        // -------------------------------------------------------------------
        public static void main (String[] args)
        {
                int creditHrs; // number of semester hours earned
                double qualityPts; // number of quality points earned
                double gpa; // grade point (quality point) average
                String line, name, inputName = "students.dat";
                String outputName = "warning.dat";
        try
                {
                // Set up scanner to input file
                // Set up the output file stream
                // Print a header to the output file
                outFile.println ();
                outFile.println ("Students on Academic Warning");
                outFile.println ();
                // Process the input file, one token at a time
                while ()
                        {
                        // Get the credit hours and quality points and
                        // determine if the student is on warning. If so,
                        // write the student data to the output file.
                        }
                // Close output file
                }
        catch (FileNotFoundException exception)
                {
                        System.out.println ("The file " + inputName + " was not
                        found.");
                }
        catch (IOException exception)
        {
                System.out.println (exception);
        }
        catch (NumberFormatException e)
        {
                System.out.println ("Format error in input file: " + e);
        }
        }
}

Answer 1

Thanks for the question.
Here is the completed code for this problem.  Let me know if you have any doubts or if you need anything to change.
Thank You !!
========================================================================================

// ************************************************************************
// Warning.java
//
// Reads student data from a text file and writes data to another text file.
// ************************************************************************

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

public class Warning {
    // -------------------------------------------------------------------
    // Reads student data (name, semester hours, quality points) from a
    // text file, computes the GPA, then writes data to another file
    // if the student is placed on academic warning.
    // -------------------------------------------------------------------
    public static void main(String[] args) {
        int creditHrs; // number of semester hours earned
        double qualityPts; // number of quality points earned
        double gpa; // grade point (quality point) average
        String line, name, inputName = "students.dat";
        String outputName = "warning.dat";
        try {
            // Set up scanner to input file
            Scanner scanner = new Scanner(new File(inputName));
            // Set up the output file stream
            PrintWriter outFile = new PrintWriter(new FileWriter(outputName));
            // Print a header to the output file
            outFile.println();
            outFile.println("Students on Academic Warning");
            outFile.println();
            // Process the input file, one token at a time
            while (scanner.hasNext()) {
                line = scanner.nextLine();
                // Get the credit hours and quality points and
                creditHrs = Integer.parseInt(line.split("\\s+")[1]);
                qualityPts = Double.parseDouble(line.split("\\s+")[2]);
                gpa = qualityPts / creditHrs;
                // determine if the student is on warning. If so,
                // write the student data to the output file.
                if (gpa < 1.5 && creditHrs < 30) {
                    outFile.write(line + "\r\n");
                } else if (gpa < 1.75 && creditHrs < 60) {
                    outFile.write(line + "\r\n");
                } else if (gpa < 2) {
                    outFile.write(line + "\r\n");
                }
            }
            // Close output file
            outFile.close();
        } catch (FileNotFoundException exception) {
            System.out.println("The file " + inputName + " was not found.");
        } catch (IOException exception) {
            System.out.println(exception);
        } catch (NumberFormatException e) {
            System.out.println("Format error in input file: " + e);
        }
    }
}

======================================================================================

Warning javax 1l class Warning 13 // Reads student data (name, semester hours, q 14 File Edit Format View Help // text file, computeธ the GPA, then vrites dat 7 if the student is placed on academic varnin 15 Smith 27 83.7 Jones 21 28.35 17 Walker 96 182.4 public static void main (String [i args) Doe 60 150 int creditHrs: // number of semester hours 19 Wood 180 408 double qualityPts;// number of quality po double gpa: /I grade point (quality point) Street 33 57.4 20 Taylor 83 190 Davis 110 198 21 warning.dat Notepad String line, nane, inputName "students.da Smart 75 2 92.5 File Edit Format View Help 23 String outputliane-"warning.dat": Bird 84 168 24 Summers 52 83.2 Students on Academic Warning Set up scanner to input file Scanner scanner new Scanner (new File( 25 Jones 21 28.35 // Set up the output file stream 27 Walker 96 182.4 PrintWriter outFile new PrintHriter( // Print a header to the output file outFile.println ): 28 Street 33 57.4 29 Davis 110 198 Smart 75 2 92.5 30 outFile.print1n("Students on Academic ให 31 Summers 52 83.2 32 outFile.println ): // Process the input file, one token at a time while (scanner.hasNextO) [ 34 35 line scanner.nextLine : // Get the credit hours and quality points and creditHrs-Integer.parseInt(line.split regex "vist[1]) qualityPts -Double.parseDouble(line.split (regexc "ys+") [2]) 37 38 gpa-qualityPts/creditHrs; 39 40 // determine if the student is on varning. If so, // vrite the student data to the output file if (gpa<1.5 &&creditHrs< 30) 41 42 Ni Warningmain0 I 6: TODO Terminal g Messages fRun Compilation completed successfully in 2 s 239 ms (a minute ago) 2674 chars, 59 line breaks 23:30 CR

thanks !