Object Oriented Design and Programming

This study material provides information on object oriented design and programming. It includes pseudo code, testing, user guide, assumptions, bugs/errors, suggestions, and codes.

Running head: OBJECT ORIENTED DESIGN AND PROGRAMMING
Object Oriented Design and Programming
Name of the Student
Name of the University
Author’s note:

1OBJECT ORIENTED DESIGN AND PROGRAMMING
Table of Contents
Pseudo Code:...................................................................................................................................2
Testing:............................................................................................................................................3
User Guide:......................................................................................................................................6
Assumptions:...................................................................................................................................7
Bugs/Errors:.....................................................................................................................................7
Suggestions:.....................................................................................................................................7
Codes:..............................................................................................................................................7
Bibliography:.................................................................................................................................11

2OBJECT ORIENTED DESIGN AND PROGRAMMING
Pseudo Code:
Initialize the private scanner variable as x
Initialize another scanner variable as input
Initialize the array of object called a
Initialize variable i and z
Assign value 1 to z
Create a method named execute
Initialize the read.txt file to be read by java private scanner x
Initialize to write into the file named new.txt using FileWriter’s object fw
Initialize PrintWriter as pw to the object called fw
While the read.txt file will have value in each line the array of objects will store it
If z is 0 then fourth and fifth position values will be task4 and grade
Then increase z
If the z is greater than 1
Then user will provide fourth and fifth position values
Each loop will store the data into new.txt using pw object
After loop is complete, the new.txt file will be closed
Now all the values stored in new.txt will be read using array of objects

3OBJECT ORIENTED DESIGN AND PROGRAMMING
Instead of storing it, the values will be shown in each loop to the java console
The read.txt file will be closed
Testing:
Test Case 1:
Input Data are as following
Student Task1 Task2 Task3
1 9.5 18.0 25.5
2 9.0 19.0 20.0
3 5.0 12.5 18.0
4 8.5 16.0 22.0
5 7.0 11.0 25.0
The following data has been inputted into the system.

4OBJECT ORIENTED DESIGN AND PROGRAMMING
All these data were successfully accepted by the program
The output was like following.
Test Case 3:
Input Data are as following
Student Task1 Task2 Task3
1 9.5 18.0 25.5
2 9.0 19.0 20.0
3 5.0 12.5 18.0

5OBJECT ORIENTED DESIGN AND PROGRAMMING
4 8.5 16.0 22.0
5 7.0 11.0 25.0
The following data has been inputted into the system.
All these data were successfully accepted by the program
The output was like following.
Test Case 3:
Input Data are as following
Student Task1 Task2 Task3

6OBJECT ORIENTED DESIGN AND PROGRAMMING
1 9.5 18.0 25.5
2 9.0 19.0 20.0
3 5.0 12.5 18.0
4 8.5 16.0 22.0
5 7.0 11.0 25.0
The following data has been inputted into the system.
All these data were successfully accepted by the program
The output was like following.

7OBJECT ORIENTED DESIGN AND PROGRAMMING
User Guide:
The user will run the application in Java IDE. After the main class is initialized, the
console will ask to enter marks and grades of students. The user will click on console output area
and enter the relevant values. After the marks and grades are entered, for all the five student’s,
the console will show what exactly has been stored in the output file.
Assumptions:
During the development of the Java application, it is assumed that the teachers will
calculate the grade on their own. It is also assumed that the array of object and FileWriter class
can be used to make the programming most effective and effecient. As the input file does not
have the headers task4 and grade. It was assumed that a login has to be put that can differentiate
what is header and what is actual value.
Bugs/Errors:
There are no bugs in the application right now. All the codes are intact and functioning.
There are no codes which can be used to exploit the application.
Suggestions:
It is suggested that automatic Grade calculation is integrated into the application in
future. Moreover, a GUI based application will be much efficient than a console based.
Codes:
Main Class:
package studentresult;
import java.io.*;

8OBJECT ORIENTED DESIGN AND PROGRAMMING
import java.util.*;
import static java.lang.System.*;
import java.util.Scanner; //importing scanner class
public class main {
private Scanner x; //initializing the scanner class access modifier to private
Scanner input = new Scanner(System.in); //creating the input object of scanner
class
String a[][] = new String[6][6]; //defining a 2d array of String
int i; //defining i variable
int j =0; // initializing j variable
int z =0;// initializing z variable
public void execute() { //method for reading file and copying the data into another
file
try {
x=new Scanner (new File("read.txt")); //initializing which file to
read
FileWriter fw = new FileWriter("new.txt"); //initializing which file
to write
PrintWriter pw = new PrintWriter(fw); //creating pw object of
PrintWriter class with fw as parameter
z=0;
while(x.hasNext()) { //will execute inside statements until
redFile.txt has unread data
if(z==0) { //check if z's value is 0
i=0; //initialize i variable
a[z][i++]=x.next(); //assign the first row value to 2d
array
a[z][i++] =x.next();
a[z][i++] =x.next();

9OBJECT ORIENTED DESIGN AND PROGRAMMING
a[z][i++] =x.next();
pw.println(a[z][0] + " " + a[z][1] + " " + a[z][2] + "
" + a[z][3] + " Task4 Grade"); //write the 2d array data and " Task4 Grade" in new.txt file's first
row
z++;
}
else { //this block is executed when z's value is more than 0
i=0; //this statement initializes i's value to 0 everytime loop
is called. This ensures that coulmn's position for 2d array is set 0 every time new line is to be
read in readFile.txt
a[z][i++]=x.next(); //assigns the values in line into 2d array
a[z][i++] =x.next();
a[z][i++] =x.next();
a[z][i++] =x.next();
System.out.println("Enter number " + z + " Studet Task4
Mark"); //ask for stuent's number for task 4
a[z][i++] = input.next(); //user input request for task 4
marks
System.out.println("Enter number " + z + " Studet Grade");
//ask for stuent's grade
a[z][i++] = input.next(); //user input request for grades
pw.println(a[z][0] + "\t\t" + a[z][1] + " " + a[z][2] + " " +
a[z][3] + " " + a[z][4] + " " + a[z][5]); //write the stored data in 2d array into new.txt for each
loop the row value will be fixed
z++; //increase z's value by 1
}
}
pw.close(); //close new.txt file so that further changes cannot be
done
}
catch(Exception e) { //catch any error in the code
System.out.print("Could not find file"); //print this message if error
found
}

10OBJECT ORIENTED DESIGN AND PROGRAMMING
}
public void openFile() { //method for reading the new.txt file
try {
x=new Scanner (new File("new.txt")); //initialize the object x, a
reference of class scanner with new.txt as parameter
z=0; //initialize z's value to 0 so that from first row data can be
read
while(x.hasNext()) { //loop for reading the data from new.txt
i=0; //initialize the i's value to 0
a[z][i++] =x.next(); //assigns the values in line into 2d array
a[z][i++] =x.next();
a[z][i++] =x.next();
a[z][i++] =x.next();
a[z][i++] =x.next();
a[z][i++] =x.next();
System.out.printf("%s\t\t %s \t%s \t%s \t%s \t%s\n", a[z]
[0], a[z][1], a[z][2], a[z][3], a[z][4], a[z][5]); //display the data stored in 2d array
z++; //increase the z's value by 1 so that next row can be
used
}
}
catch(Exception e) {//catch any error in the code
System.out.print("Could not find file"); //print this message if error
found
}
}
public void closeFile() { //method for closing the files
x.close(); //statement for close the files so that further changes cannot be
done to those files.
}

11OBJECT ORIENTED DESIGN AND PROGRAMMING
public static void main(String[] a) {
main r = new main(); //initializing the readfile class with object named r
r.execute(); //calling the method of copying data from readFile.txt and inserting
into new.txt
r.openFile(); //calling the method for displaying the data stored in new.txt
r.closeFile(); //closing the readFile.txt
}
}

12OBJECT ORIENTED DESIGN AND PROGRAMMING
Bibliography:
Cooper, J.W., 2017. Design Pattarn Java Companion. Addison Wesley.
Kitaya, H. and Inoue, U., 2016. An online automated scoring system for Java programming
assignments. International Journal of Information and Education Technology, 6(4), p.275.
Sebesta, R.W., 2016. Concepts of programming languages.
Tip, F., 2015. Infeasible paths in object-oriented programs. Science of Computer
Programming, 97, pp.91-97.