Task - File Handling - Students to be Warned

[akash-coded]

Reading from and Writing to Text Files

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. Read student data from a file and write info about the students on warning into a filed warning.dat.
2. Open and close all the resources.
3. Handle the following 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 in the 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 are thrown, but at least you can supply the user with useful information.

// ****************************************************************************
// 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 - "Students on Academic Warning"
        
            // 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);
        }
    }
}

students.dat

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 75 292.5
Bird 84 168
Summers 52 83.2

Expected Output

warning.dat

Jones 21 28.35
Walker 96 182.4
Street 33 57.4
Davis 110 198.0
Summers 52 83.2

[preeti-max]

`package File_Handling;
import java.util.Scanner;
import java.io.*;

public class Warning {
static boolean hasWarning(int creditHrs,double gpa){
if((creditHrs<30 && gpa<1.5)||(creditHrs<60 && gpa<1.75)||(gpa<2.0)){
return true;

    }
    return false;
    

}

// --------------------------------------------------------------------
// 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
    {   File f=new File("File_Handling/students.dat");
        Scanner sc=new Scanner(f);
        FileWriter writer=new FileWriter("File_Handling/warning.dat",true);
        writer.write("Students on Academic Warning\n");


        // Set up scanner to input file
        // Set up the output file stream

        // Print a header to the output file - "Students on Academic Warning"
    
        // Process the input file, one token at a time
        while(sc.hasNext())
        {  
            String data[]=sc.nextLine().split(" ");
             name=data[0];
             creditHrs=Integer.parseInt(data[1]);
             qualityPts=Double.parseDouble(data[2]);
             gpa=qualityPts/creditHrs;
             if(hasWarning(creditHrs,gpa)){
                 writer.write(name+" "+creditHrs+" "+qualityPts+"\n");
             }
             

            // 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.
         }
         writer.close();
        // 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);
    }
}

}
`

[Sarfinaa]

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

// ****************************************************************************
// 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.
  // --------------------------------------------------------------------
  static boolean defaulters(double gpa, int creditHrs) {
    return ((creditHrs < 30 && gpa < 1.5) || (creditHrs < 60 && gpa < 1.75) || (gpa < 2.0));
  }

  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 name, inputName = "students.dat";

    String outputName = "warning.dat";

    try (FileWriter fw = new FileWriter(outputName); Scanner s = new Scanner(new File(inputName));) {
      while (s.hasNextLine()) {
        String[] arg = s.nextLine().split("\\s");
        name = arg[0];
        creditHrs = Integer.parseInt(arg[1]);
        qualityPts = Double.parseDouble(arg[2]);
        gpa = qualityPts / creditHrs;
        if (defaulters(gpa, creditHrs)) {
          fw.write(name + " " + creditHrs + " " + qualityPts + "\n");
        }
      }

      // 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);
    }

  }
}

[Gaurav-Joshi-31]

import java.util.Scanner;

import java.io.*;

public class Warning {
    public static boolean shouldWarn(double gpa, int creditHrs) {
        return ((creditHrs < 30 && gpa < 1.5) || (creditHrs < 60 && gpa < 1.75) || (gpa < 2.0));
    }

    public static void main(String[] args) {
        int creditHrs;
        double qualityPts;
        double gpa;
        String line, name, inputName = "Students.dat";
        String[] info;

        String outputName = "warning.dat";

        try (Scanner scanner = new Scanner(new File(inputName))) {
            try (FileWriter writer = new FileWriter(outputName)) {
                while (scanner.hasNextLine()) {

                    line = scanner.nextLine();
                    info = line.split(" ");
                    name = info[0].trim();
                    creditHrs = Integer.parseInt(info[1].trim());
                    qualityPts = Double.parseDouble(info[2].trim());
                    gpa = qualityPts / creditHrs;
                    if (shouldWarn(gpa, creditHrs))
                        writer.write(line + "\n");
                }
            }
            System.out.println("File written successfully");

        } 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);
        }

    }
}

[Harshita-Joshi]

`package FileHandling;

import java.util.Scanner;

import javax.lang.model.type.NullType;

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 = "FileHandling/students.dat";
        
        String outputName = "FileHandling/warning.dat";
        
        try
        {
            // Set up scanner to input file
            Scanner scn = new Scanner(new FileReader(inputName));
            // Set up the output file stream
            FileWriter fwrite = new FileWriter(outputName,true);
            // Print a header to the output file - "Students on Academic Warning"
            fwrite.write("Students on Academic Warning\n");
            // Process the input file, one token at a time
            String eachLine;
            while(scn.hasNextLine())
            {
                // 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.
                eachLine = scn.nextLine();
                String[] eachTokenOfLine = eachLine.split(" ");
                name = eachTokenOfLine[0];
                creditHrs = Integer.parseInt(eachTokenOfLine[1]);
                qualityPts = Double.parseDouble(eachTokenOfLine[2]);
                gpa = qualityPts/(double)creditHrs;
                if((gpa<1.5 && creditHrs<30)||(gpa<1.75 && creditHrs<60)||(gpa<2)){
                    fwrite.write(eachLine+"\n");
                }
             }
            // Close output file
            fwrite.close();
            scn.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);
        }
    }
}`

[Shubhi27]

package session12;

import java.util.Scanner;

import java.io.*;

public class FileHandling2 {
    public static boolean hasWarning(double gpa, int creditHrs) {
        return ((creditHrs < 30 && gpa < 1.5) || (creditHrs < 60 && gpa < 1.75) || (gpa < 2.0));
    }

    public static void main(String[] args) {
        int creditHrs;
        double qualityPts;
        double gpa;
        String line, inputName = "Students.dat";
        String[] info;

        String outputName = "warning.dat";

        try (Scanner scanner = new Scanner(new File(inputName))) {
            try (FileWriter writer = new FileWriter(outputName)) {
                while (scanner.hasNextLine()) {

                    line = scanner.nextLine();
                    info = line.split(" ");
                    creditHrs = Integer.parseInt(info[1].trim());
                    qualityPts = Double.parseDouble(info[2].trim());
                    gpa = qualityPts / creditHrs;
                    if (hasWarning(gpa, creditHrs))
                        writer.write(line + "\n");
                }
            }
            System.out.println("File written ");

        } 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);
        }

    }
}

[shreiyarandive]

import java.util.Scanner;

import java.io.*;

public class Warning {

    public static boolean hasWarning(double gpa, int creditHrs) {
        return ((gpa < 1.5) && (creditHrs < 30) || (gpa < 1.75) && (creditHrs < 60) || (gpa < 2.0));
    }

    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 {

            FileReader file = new FileReader(inputName);
            Scanner scanner = new Scanner(file);

            FileWriter fileWriter = new FileWriter(outputName, true);
            fileWriter.write("Students on Academic Warning\n");

            while (scanner.hasNext()) {
                line = scanner.nextLine();
                String[] data = line.split(" ");
                name = data[0];
                creditHrs = Integer.parseInt(data[1]);
                qualityPts = Double.parseDouble(data[2]);

                gpa = qualityPts / creditHrs;

                if (hasWarning(gpa, creditHrs)) {
                    fileWriter.write(line + "\n");
                }

            }
            fileWriter.close();
            scanner.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);
        }
    }
}

[lalit-ky]

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

public class Warning {
    public static boolean shouldWarn(double gpa, int creditHrs) {
        return ((creditHrs < 30 && gpa < 1.5) || (creditHrs < 60 && gpa < 1.75) || (gpa < 2.0));
    }

    public static void main(String[] args) {
        int creditHrs;
        double qualityPts;
        double gpa;
        String line, name, inputName = "Week3/Student.dat";
        String[] info;

        String outputName = "Week3/warning.dat";

        try (Scanner reader = new Scanner(new File(inputName))) {
            try (FileWriter writer = new FileWriter(outputName)) {
                while (reader.hasNextLine()) {

                    line = reader.nextLine();
                    info = line.split(" ");
                    name = info[0].trim();
                    creditHrs = Integer.parseInt(info[1].trim());
                    qualityPts = Double.parseDouble(info[2].trim());
                    gpa = qualityPts / creditHrs;
                    if (shouldWarn(gpa, creditHrs))
                        writer.write(line + "\n");
                }
            }
            System.out.println("File written successfully");

        } 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);
        }

    }
}

[Khyati-tripathi]

package ExceptionHandling;

import java.util.Scanner;

import java.io.*;

public class Task3 {
    public static boolean warning(double gpa, int creditHrs) {
        return ((creditHrs < 30 && gpa < 1.5) || (creditHrs < 60 && gpa < 1.75) || (gpa < 2.0));
    }

    public static void main(String[] args) {
        int creditHrs;
        double qualityPts;
        double gpa;
        String line, inputName = "Students.dat";
        String[] info;

        String outputName = "warning.dat";

        try (Scanner scanner = new Scanner(new File(inputName))) {
            try (FileWriter writer = new FileWriter(outputName)) {
                writer.write("Students on Academic Warning\n");
                while (scanner.hasNextLine()) {

                    line = scanner.nextLine();
                    info = line.split(" ");
                    creditHrs = Integer.parseInt(info[1].trim());
                    qualityPts = Double.parseDouble(info[2].trim());
                    gpa = qualityPts / creditHrs;
                    if (warning(gpa, creditHrs))
                        writer.write(line + "\n");
                }
            }
            System.out.println("File written ");

        } 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);
        }

    }
}

[RohitNaikade1]

package FileHandeling;
import java.util.*;
import java.io.*;

public class Warning {

   static boolean check(int creditHrs,double gpa){
          return ((creditHrs < 30 && gpa < 1.5) || (creditHrs < 60 && gpa < 1.75) || (gpa < 2.0));
   }
    public static void main (String[]args)
    {
        int creditHrs;		
        double qualityPts;	
        double gpa;			
        String line, name, inputName = "students.dat";
        
        try
        {
            FileReader file=new FileReader("FileHandeling/students.dat");
            FileWriter fw=new FileWriter("FileHandeling/warning.dat");
            Scanner s1= new Scanner(file);
            while(s1.hasNextLine())
            {
                String str[]=s1.nextLine().split(" ");
                name=str[0];
                creditHrs=Integer.parseInt(str[1]);
                qualityPts=Double.parseDouble(str[2]);
                gpa=qualityPts/creditHrs;
                
                if(check(creditHrs,gpa)){
                    fw.write(name+" "+creditHrs+" "+gpa+"\n");
                }
             }
            s1.close();
            fw.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);
        }
    }
}

[RohitN09]

package File_handling;

import java.util.Scanner;

import java.io.*;

public class Warning {

    public static boolean hasWarning(int creditHrs, double gpa) {
        return ((gpa < 1.5 && creditHrs < 30) || (gpa < 1.75 && creditHrs < 60) || gpa < 2.0);

    }

    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 (Scanner sc = new Scanner(new File("File_handling/" + inputName))) {
            try (FileWriter writer = new FileWriter("File_handling/" + outputName)) {
                while (sc.hasNextLine()) {
                    line = sc.nextLine();
                    String[] arr = line.split(" ");
                    name = arr[0];
                    creditHrs = Integer.parseInt(arr[1]);
                    qualityPts = Double.parseDouble(arr[2]);
                    gpa = qualityPts / creditHrs;

                    if (hasWarning(creditHrs, gpa)) {
                        writer.write(line + "\n");
                    }
                }
                writer.close();
            }
            sc.close();
            System.out.println("File Written Successfully");

        } 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);
        }
    }
}

[VigneshVishwa]

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

import java.io.*;
import java.nio.file.Files;
import java.nio.file.Paths;

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 = "src/names.txt";

        String outputName = "warning.txt";

        try (Scanner sc = new Scanner(new FileReader(inputName))) {
            try (FileWriter writes = new FileWriter(outputName)) {
                while (sc.hasNextLine()) {
                    line = sc.nextLine();
                    String[] everyLine = line.split(" ");
                    name = everyLine[0];
                    creditHrs = Integer.valueOf(everyLine[1]);
                    qualityPts = Double.valueOf(everyLine[2]);
                    gpa = qualityPts / (double) creditHrs;
                    if (gpa < 1.5 && creditHrs < 30 || (gpa < 1.75 || creditHrs < 60) || gpa < 2) {
                        writes.write(name + "\n");
                    }
                }
                writes.close();
                sc.close();
            }
            {

            }
            // 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);
        }
    }
}

[Ashwesh09]

package week4;

import java.util.Scanner;

import java.io.*;
import java.lang.StringBuilder;

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, inputName = "week4/students.dat";
        String name;
        String outputName = "week4/warning.dat";
        String[] studentData;
        try(FileReader fr = new FileReader(inputName);Scanner sc = new Scanner(fr);FileWriter fw = new FileWriter(outputName))
        {
            while(sc.hasNextLine()){
                studentData = sc.nextLine().split("\\s");
                name = studentData[0]; 
                creditHrs = Integer.parseInt(studentData[1]);
                qualityPts = Double.parseDouble(studentData[2]);
                gpa = qualityPts / creditHrs;
                if(creditHrs < 30 && gpa < 1.5)
                    fw.write(name+" "+creditHrs+" "+qualityPts+"\n");
                else if(creditHrs < 60 && gpa < 1.75)
                    fw.write(name+" "+creditHrs+" "+qualityPts+"\n");
                else if (gpa < 2.0)
                    fw.write(name+" "+creditHrs+" "+qualityPts+"\n");
            }
        }
        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);
        }
        System.out.println("Operation Done!");
    }
}

[amruth2211]

`package Week4;

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

import java.io.*;
import java.util.FileWriter;
import java.util.File;

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 boolean warning(double gpa, int creditHrs) {
return ((creditHrs < 30 && gpa < 1.5) || (creditHrs < 60 && gpa < 1.75) || (gpa < 2.0));
}

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[] info;
String outputName = "warning.dat";

try {
  File file = new File("Week4/students.dat");
  Scanner scr = new Scanner(file);
  FileWriter writer = new FileWriter("Week4/warning.dat");
  writer.write("Students on Academic Warning\n");
  // Set up scanner to input file
  // Set up the output file stream

  // Print a header to the output file - "Students on Academic Warning"

  // Process the input file, one token at a time
  while (scr.hasNextLine()) {

    line = scr.nextLine();
    info = line.split(" ");
    name = info[0];
    creditHrs = Integer.parseInt(info[1].trim());
    qualityPts = Double.parseDouble(info[2].trim());
    gpa = qualityPts / creditHrs;
    if (warning(gpa, creditHrs))
      writer.write(line + "\n");
  }
  writer.close();
  scr.close();
  System.out.println("File written ");
}

catch (FileNotFoundException exception) {
  System.out.println("The file " + inputName + " was not found.");
} catch (IOException exception) {
  System.out.println(exception.getMessage());
} catch (NumberFormatException e) {
  System.out.println("Format error in input file: " + e);
}

}
}`

[sruthi-15-sketch]

import java.util.Scanner;

import javax.lang.model.type.NullType;

import java.io.*;

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;
String inputName = "C:\Users\91801\Desktop\Core-java\Session-2\text1.txt";

    String outputName = "C:\\Users\\91801\\Desktop\\Core-java\\Session-2\\textdestination.txt";

    try {
        // Set up scanner to input file
        Scanner sc = new Scanner(new FileReader(inputName));
        // Set up the output file stream
        FileWriter fwrite = new FileWriter(outputName, true);
        // Print a header to the output file - "Students on Academic Warning"
        fwrite.write("Students on Academic Warning\n");
        // Process the input file, one token at a time
        String eachLine;
        while (sc.hasNextLine()) {
            // 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.
            eachLine = sc.nextLine();
            String[] eachTokenOfLine = eachLine.split(" ");
            name = eachTokenOfLine[0];
            creditHrs = Integer.parseInt(eachTokenOfLine[1]);
            qualityPts = Double.parseDouble(eachTokenOfLine[2]);
            gpa = qualityPts / (double) creditHrs;
            if ((gpa < 1.5 && creditHrs < 30) || (gpa < 1.75 && creditHrs < 60) || (gpa < 2)) {
                fwrite.write(eachLine + "\n");
            }
        }
        // Close output file
        fwrite.close();
        sc.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);
    }
}

}

[ratnadeepikavuddagiri]

`import java.io.*;
import java.util.Scanner;
public class Warning {

static boolean isDefaulter(int sem,double gpa){
    return ((sem<30 && gpa<1.5)||(sem<60 && gpa<1.75)||(gpa<2));
}
public static void main (String[]args)
{
    int creditHrs;		
    double qualityPts;	
    double gpa;			
    String line, name, inputName = "students.dat";
    
    String outputName = "warning.dat";
    
    try
    {
        File f = new File(inputName);
        Scanner scanner = new Scanner(f);
        FileWriter writer = new FileWriter(outputName,true);
        writer.write("Students on Academic Warning:\n");

        while(scanner.hasNextLine())
        {
            String[] currentLine =scanner.nextLine().split(" ");
            name = currentLine[0];
            creditHrs =Integer.parseInt(currentLine[1]);
            qualityPts = Double.parseDouble(currentLine[2]);
            gpa = qualityPts/creditHrs;
            if(isDefaulter(creditHrs, gpa))
                writer.write(name+" "+creditHrs+" "+qualityPts+"\n");
         }
        writer.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);
    }
}

}
`

[KaminiJha]

import java.util.Scanner;

import java.io.*;

public class Warning {

    public static void main(String[] args) throws IOException {
        int creditHrs; // number of semester hours earned
        double qualityPts; // number of quality points earned
        double gpa; // grade point (quality point) average
        String name;
        String line;
        String inputName = "student.dat";
        String outputName = "warning.dat";

        try (Scanner sc = new Scanner(new File("day13/student.dat"))) {
            try (FileWriter writer = new FileWriter("day13/" + outputName);) {
                writer.append("Students on Academic Warning\n");
                // Process the input file, one token at a time
                while (sc.hasNextLine()) {
                    line = sc.nextLine();
                    String[] arr = line.split(" ");
                    name = arr[0];
                    creditHrs = Integer.parseInt(arr[1]);
                    qualityPts = Double.parseDouble(arr[2]);
                    gpa = qualityPts / creditHrs;
                    if (gpa < 1.5 && creditHrs < 30 || gpa < 1.75 && creditHrs < 60 || gpa < 2.0) {
                        writer.append(name + " " + creditHrs + " " + qualityPts + "\n");
                    }
                }
                // Close output file
                writer.close();
            }

            sc.close();
            System.out.println("Created warning file successfully");
        } 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);
        }
    }
}

[Snehil6197]

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

import javax.naming.NameAlreadyBoundException;

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) // throws NumberFormatException
{
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 = "daily class activity/file_handling/students.dat";

    String outputName = "daily class activity/file_handling/warning.dat";
    File file = new File(inputName);
    Scanner fileReader = null;
    FileWriter fw = null;
    try {
        fileReader = new Scanner(file);
        fw = new FileWriter(outputName);
        fw.write("Students on Academic Warning");
        // Process the input file, one token at a time
        while (fileReader.hasNextLine()) {
            name = fileReader.next();
            creditHrs = Integer.parseInt(fileReader.next());
            qualityPts = Double.parseDouble(fileReader.next());
            gpa = qualityPts / (double) creditHrs;
            if (gpa < 1.5 && creditHrs < 30) {
                fw.write(name + " " + creditHrs + " " + qualityPts);
                System.out.println(name + " " + creditHrs + " " + qualityPts);
            } else if (gpa < 1.75 && creditHrs < 60) {
                fw.write(name + " " + creditHrs + " " + qualityPts);
                System.out.println(name + " " + creditHrs + " " + qualityPts);
            } else if (gpa < 2) {
                fw.write(name + " " + creditHrs + " " + qualityPts);
                System.out.println(name + " " + creditHrs + " " + qualityPts);
            }
            // System.out.println("check");

        }
        fileReader.close();
        fw.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);
    }
}

}

[vysh675]

import java.util.;
import java.io.;

public class studentfile {
static boolean hasWarning(int creditHrs, double gpa) {
if ((creditHrs < 30 && gpa < 1.5) || (creditHrs < 60 && gpa < 1.75) || (gpa < 2.0)) {
return true;

    }
    return false;

}

public static void main(String[] args) {
    int creditHrs; 
    double qualityPts;
    double gpa; 
    String name;

    try {
        File f = new File("students.dat");
        Scanner sc = new Scanner(f);
        FileWriter mywriter = new FileWriter("warning.dat");
        mywriter.write("Students on Academic Warning\n");
        while (sc.hasNext()) {
            String data[] = sc.nextLine().split(" ");
            name = data[0];
            creditHrs = Integer.parseInt(data[1]);
            qualityPts = Double.parseDouble(data[2]);
            gpa = qualityPts / creditHrs;
            if (hasWarning(creditHrs, gpa)) {
                mywriter.write(name + " " + creditHrs + " " + qualityPts + "\n");
            }
        }
        mywriter.close();
    } catch (FileNotFoundException exception) {
        System.out.println("The file  was not found.");
    } catch (IOException e) {
        System.out.println(e);
    } catch (NumberFormatException e) {
        System.out.println(e);
    }
}

}

[Amrit-Raj22]

package week3d3;

// ****************************************************************************
// 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 {
    public static boolean checkWarning(int creditHrs, double gpa) {
        return ((creditHrs < 30 && gpa < 1.5) || (creditHrs < 60 && gpa < 1.75) || (gpa < 2.0));
    }

    public static void main(String[] args) {
        int creditHrs;
        double qualityPts;
        double gpa;
        String line, name, inputName = "week3d3/student.dat";

        String outputName = "week3d3/warning.dat";

        try {
            File f1 = new File(inputName);
            Scanner sc = new Scanner(f1);
            FileWriter f2 = new FileWriter(outputName);

            // Process the input file, one token at a time
            while (sc.hasNextLine()) {
                String str[] = sc.nextLine().split(" ");
                name = str[0];
                creditHrs = Integer.parseInt(str[1]);
                qualityPts = Double.parseDouble(str[2]);
                gpa = qualityPts / creditHrs;

                if (checkWarning(creditHrs, gpa)) {
                    f2.write(name + " " + creditHrs + " " + gpa + "\n");
                }
            }

            sc.close();
            f2.close();
            // 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);
        }
    }
}

[Mrafe]

package week4.Tuesday;

// ****************************************************************************
// 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 = "week4/Tuesday/students.dat";

        String outputName = "week4/Tuesday/warning.dat";

        try {
            // Set up scanner to input file
            Scanner scanner = new Scanner(new FileReader(inputName));
            // Set up the output file stream
            FileWriter fwrite = new FileWriter(outputName, true);
            // Print a header to the output file - "Students on Academic Warning"
            fwrite.write("Students on Academic Warning\n");
            // Process the input file, one token at a time
            while (scanner.hasNextLine()) {
                // 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.
                line = scanner.nextLine();
                String[] eachTokenOfLine = line.split(" ");
                name = eachTokenOfLine[0];
                creditHrs = Integer.parseInt(eachTokenOfLine[1]);
                qualityPts = Double.parseDouble(eachTokenOfLine[2]);
                gpa = qualityPts / (double) creditHrs;
                if ((gpa < 1.5 && creditHrs < 30) || (gpa < 1.75 && creditHrs < 60) || (gpa < 2)) {
                    fwrite.write(line + "\n");
                }
            }
            // Close output file
            fwrite.close();
            scanner.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);
        }
    }
}

[rakeshGit419]

import java.util.Scanner;

import java.io.*;

public class Warning {
    public static boolean shouldWarn(double gpa, int creditHrs) {
        return ((creditHrs < 30 && gpa < 1.5) || (creditHrs < 60 && gpa < 1.75) || (gpa < 2.0));
    }

    public static void main(String[] args) {
        int creditHrs;
        double qualityPts;
        double gpa;
        String line, name, inputName = "Students.dat";
        String[] info;

        String outputName = "warning.dat";

        try (Scanner scanner = new Scanner(new File(inputName))) {
            try (FileWriter writer = new FileWriter(outputName)) {
                while (scanner.hasNextLine()) {

                    line = scanner.nextLine();
                    info = line.split(" ");
                    name = info[0].trim();
                    creditHrs = Integer.parseInt(info[1].trim());
                    qualityPts = Double.parseDouble(info[2].trim());
                    gpa = qualityPts / creditHrs;
                    if (shouldWarn(gpa, creditHrs))
                        writer.write(line + "\n");
                }
            }
            System.out.println("File written successfully");

        } 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);
        }

    }
}

[Prem-3]

`import java.util.;
import java.io.;

public class Warning {
public static boolean warning(double gpa, int creditHrs) {
return ((creditHrs < 30 && gpa < 1.5) || (creditHrs < 60 && gpa < 1.75) || (gpa < 2.0));
}

public static void main(String[] args) {
    int creditHrs;
    double qualityPts;
    double gpa;
    String line, inputName = "Students.dat";
    String[] info;

    String outputName = "warning.dat";

    try (Scanner scanner = new Scanner(new File(inputName))) {
        try (FileWriter writer = new FileWriter(outputName)) {
            writer.write("Students on Academic Warning\n");
            while (scanner.hasNextLine()) {

                line = scanner.nextLine();
                info = line.split(" ");
                creditHrs = Integer.parseInt(info[1].trim());
                qualityPts = Double.parseDouble(info[2].trim());
                gpa = qualityPts / creditHrs;
                if (warning(gpa, creditHrs))
                    writer.write(line + "\n");
            }
        }
        System.out.println("File written ");

    } 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);
    }

}

}
`

[PavanArvapally]

package Tasks;

import java.util.Scanner;

import java.io.*;

public class Warning {

    public static boolean isWarning(double gpa, int creditHrs) {
        return ((creditHrs < 30 && gpa < 1.5) || (creditHrs < 60 && gpa < 1.75) || (gpa < 2.0));
    }

    public static void main(String[] args) {
        int creditHrs;
        double qualityPts;
        double gpa;
        String line, inputName = "Core-Java/Tasks/students.dat";
        String[] data;

        String outputName = "Core-Java/Tasks/warning.dat";

        try {

            FileReader file = new FileReader(inputName);
            Scanner sc = new Scanner(file);

            FileWriter fw = new FileWriter(outputName);

            while (sc.hasNextLine()) {
                line = sc.nextLine();
                System.out.println(line);
                data = line.split(" ");
                creditHrs = Integer.parseInt(data[1].trim());
                qualityPts = Double.parseDouble(data[2].trim());
                gpa = qualityPts / creditHrs;
                if (!isWarning(gpa, creditHrs)) {
                    fw.write(line + "\n");
                }
            }
            fw.close();
            sc.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);
        }

    }
}

[charani712]

import java.util.Scanner;

import javax.lang.model.type.NullType;

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 = "FileHandling/students.dat";

    String outputName = "FileHandling/warning.dat";
    
    try
    {
        // Set up scanner to input file
        Scanner scn = new Scanner(new FileReader(inputName));
        // Set up the output file stream
        FileWriter fwrite = new FileWriter(outputName,true);
        // Print a header to the output file - "Students on Academic Warning"
        fwrite.write("Students on Academic Warning\n");
        // Process the input file, one token at a time
        String eachLine;
        while(scn.hasNextLine())
        {
            // 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.
            eachLine = scn.nextLine();
            String[] token = eachLine.split(" ");
            name = token[0];
            creditHrs = Integer.parseInt(token[1]);
            qualityPts = Double.parseDouble(token[2]);
            gpa = qualityPts/(double)creditHrs;
            if((gpa<1.5 && creditHrs<30)||(gpa<1.75 && creditHrs<60)||(gpa<2)){
                fwrite.write(eachLine+"\n");
            }
         }
        // Close output file
        fwrite.close();
        scn.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);
    }
}

}

[mkaifahmed]

import java.util.Scanner;

import java.io.*;

public class Warning {
    public static void main(String[] args) {
        int creditHrs; 
        double qualityPts; 
        double gpa; // grade point (quality point) average
        String line, name, inputName = "week4/Tuesday/students.dat";

        String outputName = "week4/Tuesday/warning.dat";

        try {
            // Set up scanner to input file
            Scanner scanner = new Scanner(new FileReader(inputName));
            // Set up the output file stream
            FileWriter fwrite = new FileWriter(outputName, true);
            // Print a header to the output file - "Students on Academic Warning"
            fwrite.write("Students on Academic Warning\n");
            // Process the input file, one token at a time
            while (scanner.hasNextLine()) {
                // 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.
                line = scanner.nextLine();
                String[] eachTokenOfLine = line.split(" ");
                name = eachTokenOfLine[0];
                creditHrs = Integer.parseInt(eachTokenOfLine[1]);
                qualityPts = Double.parseDouble(eachTokenOfLine[2]);
                gpa = qualityPts / (double) creditHrs;
                if ((gpa < 1.5 && creditHrs < 30) || (gpa < 1.75 && creditHrs < 60) || (gpa < 2)) {
                    fwrite.write(line + "\n");
                }
            }
            // Close output file
            fwrite.close();
            scanner.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);
        }
    }
}

[ujjwal18bit1167]

import java.util.Scanner;

import java.io.*;

public class FileHandling2 {
    public static boolean hasWarning(double gpa, int creditHrs) {
        return ((creditHrs < 30 && gpa < 1.5) || (creditHrs < 60 && gpa < 1.75) || (gpa < 2.0));
    }

    public static void main(String[] args) {
        int creditHrs;
        double qualityPts;
        double gpa;
        String line, inputName = "Students.dat";
        String[] info;

        String outputName = "warning.dat";

        try (Scanner scanner = new Scanner(new File(inputName))) {
            try (FileWriter writer = new FileWriter(outputName)) {
                while (scanner.hasNextLine()) {

                    line = scanner.nextLine();
                    info = line.split(" ");
                    creditHrs = Integer.parseInt(info[1].trim());
                    qualityPts = Double.parseDouble(info[2].trim());
                    gpa = qualityPts / creditHrs;
                    if (hasWarning(gpa, creditHrs))
                        writer.write(line + "\n");
                }
            }
            System.out.println("File written ");

        } 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);
        }

    }
}

[DivikaAgrawal]

import java.util.Scanner;

import java.io.*;

public class Warning {

    public static boolean hasWarning(double gpa, int creditHrs) {
        return ((gpa < 1.5) && (creditHrs < 30) || (gpa < 1.75) && (creditHrs < 60) || (gpa < 2.0));
    }

    public static void main(String[] args) {
        int creditHrs; 
        double qualityPts; 
        double gpa; 
        String line, name, inputName = "students.dat";

        String outputName = "warning.dat";

        try {

            FileReader file = new FileReader(inputName);
            Scanner scanner = new Scanner(file);

            FileWriter fileWriter = new FileWriter(outputName, true);
            fileWriter.write("Students on Academic Warning\n");

            while (scanner.hasNext()) {
                line = scanner.nextLine();
                String[] data = line.split(" ");
                name = data[0];
                creditHrs = Integer.parseInt(data[1]);
                qualityPts = Double.parseDouble(data[2]);

                gpa = qualityPts / creditHrs;

                if (hasWarning(gpa, creditHrs)) {
                    fileWriter.write(line + "\n");
                }

            }
            fileWriter.close();
            scanner.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);
        }
    }
}