Java code: Instructions are in first image. Skeleton code in the second.
Java code: Instructions are in first image. Skeleton code in the second.
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Java code:
Instructions are in first image. Skeleton code in the second.
Transcribed Image Text: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:
1. 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.
2. 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. Test the number of
semester hours earned if less than zero or greater than 120 throw to an exception handler class with message and exit program. Compute the GPA. Test the GPA
when greater than 4.0 or less than zero throw to an exception handler class with message and exit program. 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.
3. After the loop close the PrintWriter.
4. Think about the exceptions that could be thrown by this program:
• A FileNotFoundException if the input file does not exist
o A NumberFormatException if it can't parse an int or double when it tries to - this indicates an error in the input file format
o An InputMismatchException
o An IOException if something else goes wrong with the input or output stream
• An all purpose exception
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.
5. Test the program. Test data is in the file students.dat. Be sure to test each of the exceptions as well.
![Run Arguments
1 //
2// Warning.java
3//
4// Reads student data from a text file and writes data to another text file.
5 // ***.
6 import java.util.Scanner;
7 import java.io.*;
8 public class Warning
7/
/ 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)
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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
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// 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 ()
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// 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.
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// Close output file
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catch (FileNotFoundException exception)
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System.out.println ("The file " + inputName +
* was not found.");
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catch (1OException exception)
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System.out.println (exception);
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catch (NumberFormatException e)
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System.out.println ("Format error in input file: " + e);
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53}](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa54ebcc0-d64d-4088-b618-b6b6452ef205%2F0425d229-e28a-4675-a77b-dd80ca70e7b0%2F44px1dm_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Run Arguments
1 //
2// Warning.java
3//
4// Reads student data from a text file and writes data to another text file.
5 // ***.
6 import java.util.Scanner;
7 import java.io.*;
8 public class Warning
7/
/ 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)
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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
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// 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 ()
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// 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.
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// Close output file
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catch (FileNotFoundException exception)
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System.out.println ("The file " + inputName +
* was not found.");
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catch (1OException exception)
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System.out.println (exception);
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catch (NumberFormatException e)
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System.out.println ("Format error in input file: " + e);
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53}
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