Question

using the java programming language

Design a "Student Record Management System" in java including the following functionalities:

1 Input: Input student num, DOB, address, phone number etc. Input course titles, course number, time/locations. Input grade of each course for each student.

2 Process: Calculate GPA for each student. Sort and search on given criteria.

3 Output: Search by student num, show the student's information (including all courses and grades). Search by course num, show course information (including all students and grades).

4 Storage: Store Student/Course/Grade information in

a) Text file or Random Access File. b) Serialized object file c) Database file(optional).

Answer 1

Data will be stored in file.

package semesterproject;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.Scanner;

public class SemesterProject {

private static Object java;

public static void main(String[] args) {

System.out.print("\n**********STUDENT MANAGEMENT SYSTEM**********\n");
int passCount = 1;
while (passCount < 4) {
System.out.print("\nLOG IN AS ADMIN\n"); //Login to the program
System.out.println("\n(Username: admin\tPassword: 1234)\n");
Scanner input = new Scanner(System.in);
System.out.print("Enter Username: ");
String user = input.nextLine();
System.out.print("Password: ");
String password = input.nextLine();
if (user.equalsIgnoreCase("admin") && password.equals("1234")) { //Checks password and Username (if valid)

int num = 0;

while (num != 7) {
try {

System.out.println("\nPRESS GIVEN KEYS TO PERFORM ACTION\n\n 1:\tStudent Portal\n 2:\tTake Attendence\n 3:\tView Attendence Status\n 4:\tUpdate Marks\n 5:\tView Marks Summary\n 6:\tView Students Record\n 7:\tExit");
System.out.print("\nEnter an integer: ");

num = input.nextInt();

switch (num) { //Main Menu Options (Select any of them)

case 1: {
StudentPortal(); //Performs actions like adding, searching, removing and editing student info
break;
}
case 2: {
TakeAttendence(); //takes attendence of added students
WhereToGo();
break;
}
case 3: {
ViewAttendence();
WhereToGo();
break;
}
case 4: {
UpdateMarks(); //to update marks of added students
WhereToGo();
break;
}
case 5: {
ViewMarksSummary();
WhereToGo();
break;
}
case 6: {
ViewRecord(); //to view added students list
WhereToGo();
break;
}
case 7: { //In case you want to exit the program

System.out.println("PROGRAM EXITED SUCCESSFULLY\n");
System.exit(0);
break;

}
default: { //in case user input is not suitable (not an above given number)
System.out.print("PLEASE ENTER VALID INPUT\n");

}

}

} catch (Exception e) { //in case user input is not an integer
System.out.println("PLEASE ENTER AN INTEGER");
return;
}
}
} else { //In case entered password or username is incorrect

System.out.println("Wrong Password or Username (" + (3 - passCount) + " attempt/s left)");
passCount++;
}
}
System.out.println("\nTOO MANY WRONG ATTEMPTS, PROGRAM TERMINATED");
}

public static void StudentPortal() {
int exitCount = 0;
try {

while (exitCount == 0) {
Scanner input = new Scanner(System.in);
System.out.println("\nPRESS FOLLOWING KEY TO PERFORM ACTION\n\n 1:\tAdd Student\n 2:\tSearch Student\n 3:\tRemove Student\n 4:\tBack to Main Menu");
System.out.print("\nEnter an integer: ");
int num = input.nextInt();

switch (num) {

case 1: {
AddStudent(); //to add new students
return;

}
case 2: {
SearchStudent(); //to search from added students
WhereToGo();
return;
}
case 3: {
RemoveStudent(); //to remove any of the added students
WhereToGo();
return;
}
case 4: { //in case user wants to return to main menu

return;

}
default: { //in case the input entered is not correct

System.out.print("\nPLEASE ENTER A VALID INPUT");
}

}

}
} catch (Exception e) {

System.out.println("PLEASE! ENTER AN INTEGER");
StudentPortal();
}
}

public static void AddStudent() {
try {

java.io.File file = new java.io.File("Data.txt"); //Creating a text file to store students info
java.io.FileWriter fw = new FileWriter(file, true); //appending the data if file already exists
try (java.io.BufferedWriter bw = new java.io.BufferedWriter(fw)) {

int exitCount = 1;
while (exitCount == 1) {

System.out.print("\nHow many students you want to add: ");
Scanner input = new Scanner(System.in);
int n = input.nextInt(); //gets an integer as number of students

for (int i = 0; i < n; i++) {
System.out.println("\nENTER STUDENT INFO");

System.out.print("\nStudent First Name: ");
String fname = input.next(); //gets firstname from user

System.out.print("\nStudent Last Name: ");
String sname = input.next(); //getting last name

System.out.print("\nRegistration number: ");
String rnum = input.next(); //getting registration number of student

bw.write(fname + " " + sname + "\t\t" + rnum + "\n"); // writing the above given data to the text file
bw.newLine();

}

bw.close();

System.out.println("\nPress '1' to add more students\nPress '2' to return to Main Menu\nPress any other key to exit");
exitCount = input.nextInt();
if (exitCount == 1) {

} else if (exitCount == 2) {
return;
} else {
System.exit(0);
}

}
}

} catch (Exception e) { //in case user input is not valid
System.out.println("\nINVALID INPUT, Please Enter an Integer\n");
AddStudent();

}

}

public static void TakeAttendence() {
Scanner input = new Scanner(System.in);
int count = 0;
try {

File file = new File("Data.txt"); //Accessing the file
Scanner read = new Scanner(file); //importing a scanner to read from the text file

if (file.exists()) {
java.io.File attFile = new java.io.File("Attendence.txt"); //creating a new text file (not appending)
java.io.PrintWriter write = new java.io.PrintWriter(attFile);

System.out.println("\n***** IT'S ATTENDENCE TIME *****\n");
SimpleDateFormat formatter = new SimpleDateFormat("'Date: 'dd-MM-yyyy' | Time: 'HH:mm:ss");
Date date = new Date(System.currentTimeMillis());
System.out.println("\n" + formatter.format(date) + "\n");
write.println("\n");
write.print(formatter.format(date) + "\n");
write.println("\n");
write.println("NO.\tSTUDENT NAME\t\tREG. NUMBER\t\tSTATUS");
write.println();

int num = 1;
int present = 0;
int absent = 0;
while (read.hasNext()) { //reading from the file of added students

String student = read.nextLine();

if (!read.nextLine().equals(" ")) { //making sure the line is not empty
int n = 0;
while (n == 0) { //to keep asking for valid input until the user enters
String s;

System.out.println(num + ".\t" + student);
System.out.println("\tP: Present\tA: Absent");

s = input.next(); //getting input for students status

if (s.equalsIgnoreCase("p")) {
write.print(num + ".\t" + student + "\t\tPRESENT"); //writing the status in the file
write.println("");
present++;
num++;
n = 1;
} else if (s.equalsIgnoreCase("a")) {
write.print(num + ".\t" + student + "\t\tABSENT");
write.println("");
absent++;
num++;
n = 1;
} else { //in case user enter invalid input (other than 'p' and 'a')
System.out.println("ENTER VALID INPUT:(P: Present\tA: Absent)\n");
n = 0;
}

}
}
}
write.print("\nATTENDENCE DETAIL\nPresents:\t" + present + "\nAbsents:\t" + absent);
read.close(); //closing the read (necessary)
write.close(); //closing write (necessary)
System.out.println("-----ATTENDENCE SUCCESSFULLY UPDATED-----");
}
} catch (Exception e) { //In case file is empty or doesn't exist.
System.out.print("NO RECORD AVAILABLE. Add students first\n");

}
}

public static void ViewAttendence() {
try {
File att = new File("Attendence.txt"); //Accessing the file in directory
Scanner read = new Scanner(att);
if (read.hasNext()) { //checking if the file is not empty
while (read.hasNext()) {

System.out.print(read.nextLine() + "\n"); //printing out the line read by the scanner

}
} else { //in case the file is empty

System.out.print("ATTENDENCE NOT TAKEN YET, Take Attendence first");
}
} catch (FileNotFoundException ex) { //in case file doesnt exist
System.out.print("FILE DOES NOT EXIST, Take Attendence first");
}

}

public static void ViewRecord() throws IOException {

try {
File data = new File("data.txt"); //Accessing the file
Scanner read = new Scanner(data);

if (read.hasNext()) { //if the file is not empty
Scanner input = new Scanner(System.in);
System.out.print("PRESS GIVEN KEYS TO VIEW SORTED LIST\n\n1:\tSort by Name\n2:\tSort by Registeration Number\n3:\tSort by time\n\nEnter an Integer: ");
int option = input.nextInt(); //getting user's option as input
switch (option) {

case 1: {
SortByName(); //calling the method to sort the record by name
break;
}
case 2: {
SortByReg(); //calling the method to sort the record by reg no.
break;
}
case 3: {
SortByTime(); //calling the method to sort the record by time
break;
}
default: { //in case user enters wrong input
System.out.print("PLEASE ENTER VALID INPUT\n\n");
ViewRecord();
}
}
} else { //if the file is empty
System.out.print("\nNO RECORD AVAILABLE, Add Students first\n");
}

} catch (FileNotFoundException e) { //if the file does not exist
System.out.print("\nFILE DOES NOT EXIST, Add Students first\n");

}

}

public static void UpdateMarks() {

try {

File file = new File("Data.txt"); //Accessing the file
Scanner read = new Scanner(file);
Scanner input = new Scanner(System.in);
File f = new File("Marks.txt"); //Creating a new file to store marks
PrintWriter write = new PrintWriter(f);
if (read.hasNext()) { //if the file is not empty

System.out.println("----UPDATE STUDENTS MARKS----\n");
System.out.print("\nTotal Marks: ");
int tmarks = input.nextInt(); //getting total marks from user as an input
write.println();
write.println("NO.\tSTUDENT NAME\t\tREG. NUMBER\t\tMARKS OBTAINED\t\tTOTAL MARKS\t\tPERCENTAGE");
write.println();
int num = 1;
while (read.hasNext()) {
String student = read.nextLine();

if (read.nextLine() != "") { //if the line to be printed is not empty

int n = 1;
while (n == 1) {
System.out.println("\n" + num + ".\t" + student);
System.out.print("\nMarks Obtained: ");
int omarks = input.nextInt(); //getting obtained marks

if (omarks >= 0 && omarks <= tmarks) { //checkin domain obtained marks
write.print(num + ".\t" + student + "\t\t " + omarks + "\t\t\t" + tmarks + "\t\t\t" + ((long) (omarks * 100 / tmarks)) + "%"); //writing the marks of each student into a file
write.println();
n = 0;
} else { //if obtained marks are more than total marks or less than 0
System.out.println("PLEASE ENTER MARKS WITHIN 0-" + tmarks);
n = 1;
}
}
num++;
}

}
System.out.println("\n-----MARKS UPDATED SUCCESSFULLY------");

} else { //if the file is empty
System.out.print("NO RECORD AVAILABLE. Add Students first");
}
read.close();
write.close();

} catch (FileNotFoundException e) { //if the file does not exist
System.out.println("NO RECORD AVAILABLE. Add Students first");

}

}

public static void ViewMarksSummary() {

try {
File marks = new File("Marks.txt"); //Accessing the file
Scanner read = new Scanner(marks);
if (read.hasNext()) { //if the file is not empty
while (read.hasNext()) {

System.out.print(read.nextLine() + "\n");

}
} else { //if the file is empty

System.out.print("MARKS NOT UPDATED YET, Update Marks first");
}
} catch (FileNotFoundException ex) { //if the file does not exist
System.out.print("FILE DOES NOT EXIST, Update Marks first");
}

}

public static void SearchStudent() {
File file = new File("Data.txt"); //Accessing the file

Scanner read;
Scanner input = new Scanner(System.in);
try {

read = new Scanner(file);
if (read.hasNext()) {

System.out.print("Search by Registraion Number: ");
String rSearch = input.next();
boolean found = false;
while (read.hasNext()) {
String student = read.nextLine();
if (student.contains(rSearch)) { //check if the search has found
found = true;
System.out.println("\n" + student);
}

}
if (!found) { //if search is not found

System.out.println("\nNO MATCH FOUND");

}
read.close();

}
} catch (Exception e) {
System.out.println("NO RECORD FOUND. Add Students first");

}
}

public static void RemoveStudent() {

try {

SortByTime(); //Displaying the list of student to choose which one to be removed
File sourcefile = new File("Data.txt");
Scanner sourceread = new Scanner(sourcefile);

Scanner input = new Scanner(System.in);

if (sourceread.hasNext()) {
System.out.print("\n\nEnter Registration number you want to remove: ");
String rStudent = input.next();

File newfile = new File("temp.txt"); //Creating a temporary file
FileWriter fw = new FileWriter(newfile);
PrintWriter tempWriter = new PrintWriter(fw);
boolean found = false;
while (sourceread.hasNext()) { //reading from source file
String student = sourceread.nextLine();

if (!student.contains(rStudent)) {

tempWriter.write(student); //writing in temporary file
tempWriter.write("\n");

} else {
found = true;
}

}

tempWriter.close();
if (found == true) {
Scanner tempread = new Scanner(newfile);
PrintWriter sourceWriter = new PrintWriter(new FileWriter(sourcefile));
while (tempread.hasNext()) { //Reading from temporary file

sourceWriter.write(tempread.nextLine()); //Writing in source file
sourceWriter.write("\n");

}

tempread.close();
sourceWriter.close();
sourceread.close();
newfile.delete();
System.out.println("\n\nSTUDENT REMOVED SUCCESSFULLY");
} else { //if the reg number not found
System.out.println("Not available or already removed");
}
}

} catch (Exception e) { //if the source file is empty
System.out.println("NO RECORD FOUND. Add Students first");

}

}

public static void SortByName() throws IOException {

File file = new File("Data.txt"); //Accessing the file
BufferedReader br = new BufferedReader(new FileReader(file));

ArrayList<String> stds = new ArrayList<String>(); //creating array list of string
System.out.print("STUDENT NAME\t\tREG. NUMBER\n\n");
while (br.ready()) { //reading from the file

String student = br.readLine();
stds.add(student);

}
br.close(); //closing reader

Collections.sort(stds, String.CASE_INSENSITIVE_ORDER); //making a sorted collection
for (String s : stds) { //printing out linewise
System.out.println(s);
}

}

public static void SortByReg() throws IOException { //sorts the students by reg. numbers
File file = new File("Data.txt"); //accessing the file
BufferedReader br = new BufferedReader(new FileReader(file));

ArrayList<String> stds = new ArrayList<String>(); //creating array list of string
System.out.print("STUDENT NAME\t\tREG. NUMBER\n\n");
while (br.ready()) { //reading from the file

String student = br.readLine();
stds.add(student);

}
br.close(); //closing reader

Collections.sort(stds, new Comparator<String>() { //creating a collection of students
public int compare(String o1, String o2) { //comparing reg numbers to sort
return extractInt(o1) - extractInt(o2);
}

int extractInt(String s) {
String num = s.replaceAll("\\D", "");
// return 0 if no digits found
return num.isEmpty() ? 0 : Integer.parseInt(num);
}
});
for (String s : stds) { //printing line by line
System.out.println(s);
}

}

public static void SortByTime() throws FileNotFoundException {

java.io.File file = new java.io.File("Data.txt"); //Accessing the stored data

int num = 1; //numbering the list

Scanner read = new Scanner(file);
if (read.hasNext()) { //checking if the file not empty
System.out.println("\nNO.\tSTUDENT NAME\t\tREG. NUMBER\n");
while (read.hasNext()) {

String student = read.nextLine();
if (!student.isEmpty()) { //making sure the line to be printed is not empty
System.out.println(num + ".\t" + student);
num++;
}

}
} else { //if the file is empty

System.out.println("FILE IS EMPTY, Add students first");
}

}

public static void WhereToGo() { //asks the user for next possible actions

int exitCount = 0;
Scanner input = new Scanner(System.in);
System.out.println("\n Press '1' for Main menu, any other key to exit");
exitCount = input.nextInt(); //asking user to enter choice
if (exitCount == 1) {
return; //returns to main
} else {
System.exit(0); //yerminates the program
}

}
}