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Displaying Source Code(s)
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School Management System
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Description : Program for Student Management
//Case Study
import java.awt.*;
import java.io.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.event.*;
public class ProjectX extends JFrame implements ChangeListener,
ActionListener
{
static int choice = 0;
static String line = "--------------------------------<BR>;
DataInputStream inputData = new DataInputStream(System.in);
private Registration studentDetails = new Registration();
int topScore = studentDetails.getTopScore();
int passMarks = studentDetails.getPassMarks();
int firstClass = studentDetails.getFirstClass();
int secondClass = studentDetails.getSecondClass();
JTabbedPane tabbedPane = new JTabbedPane();
JLabel statusLabel = new JLabel();
JLabel titleLabel = new JLabel("Student Software Beta Edition");
JPanel addStudentPanel = new JPanel();
JTextField studentName = new JTextField();
JTextField physicsMarks = new JTextField();
JTextField biologyMarks = new JTextField();
JTextField mathsMarks = new JTextField();
JButton submitDetails = new JButton("Submit Details");
JPanel studentDetailsPanel = new JPanel();
JTextField studentID1 = new JTextField();
JTextArea studentInfo = new JTextArea();
JButton submitID1 = new JButton("Submit ID");
JPanel studentGradePanel = new JPanel();
JTextField studentID2 = new JTextField();
JTextArea studentGrade = new JTextArea();
JButton submitID2 = new JButton("Submit ID");
JPanel numberPassedPanel = new JPanel();
JTextArea studentPassed = new JTextArea();
JPanel classTopperPanel = new JPanel();
JTextArea studentTopper = new JTextArea();
public ProjectX(String frameTitle)
{
super(frameTitle);
setResizable(true);
setSize(400,400);
submitDetails.addActionListener(this);
submitID1.addActionListener(this);
submitID2.addActionListener(this);
getContentPane().setLayout(new BorderLayout());
getContentPane().add(titleLabel,"North");
tabbedPane.addTab("Add Student",addStudentPanel);
addStudentPanel.setLayout(new GridLayout(8,2,5,5));
addStudentPanel.add(new JLabel("Student Name: "));
addStudentPanel.add(studentName);
addStudentPanel.add(new JLabel("Physics Marks: "));
addStudentPanel.add(physicsMarks);
addStudentPanel.add(new JLabel("Biology Marks: "));
addStudentPanel.add(biologyMarks);
addStudentPanel.add(new JLabel("Maths Marks: "));
addStudentPanel.add(mathsMarks);
addStudentPanel.add(submitDetails);
tabbedPane.addTab("Student Details",studentDetailsPanel);
studentDetailsPanel.add(new JLabel("Enter Student ID: "));
studentDetailsPanel.add(studentID1);
studentDetailsPanel.add(submitID1);
studentDetailsPanel.add(new JLabel("Student Details:"));
studentDetailsPanel.add(studentInfo);
tabbedPane.addTab("Student Grade",studentGradePanel);
studentGradePanel.setLayout(new GridLayout(5,2,5,5));
studentGradePanel.add(new JLabel("Enter Student ID: "));
studentGradePanel.add(studentID2);
studentGradePanel.add(submitID2);
studentGradePanel.add(new JLabel("Student Grade:"));
studentGradePanel.add(studentGrade);
tabbedPane.addTab("Passed Student",numberPassedPanel);
numberPassedPanel.setLayout(new GridLayout(2,2,5,5));
numberPassedPanel.add(new JLabel("Number of Student Passed: "));
numberPassedPanel.add(studentPassed);
tabbedPane.addTab("Class Topper",classTopperPanel);
classTopperPanel.setLayout(new GridLayout(2,2,5,5));
classTopperPanel.add(new JLabel("Here are the class Toppers:
"));
classTopperPanel.add(studentTopper);
tabbedPane.addChangeListener(this);
getContentPane().add(tabbedPane,"Center");
statusLabel.setText("Status: Normal");
getContentPane().add(statusLabel,"South");
setVisible(true);
}
public static void main(String args[])
{
ProjectX outputScreen = new ProjectX("Case Study");
}
public String setStudentInfo()
{
int id = studentDetails.addStudent(studentName.getText(),
Integer.parseInt(physicsMarks.getText()),
Integer.parseInt(biologyMarks.getText()),
Integer.parseInt(mathsMarks.getText()));
return ("<BR> +
line +
"Record Created For " + studentName +
"<BR> +
"Student ID: " + id +
"<BR> +
line );
}
public String getStudentInfo()
{
int id = Integer.parseInt(studentID1.getText());
if(studentDetails.getStudentDetails(id))
return ("<BR> +
line +
"Student Details<BR> +
line +
"Student ID:" + " " + id + "<BR> +
"Student Name:" + " " + studentDetails.studentName + "<BR> +
"Physics Marks:" + " " + studentDetails.physicsMarks + "<BR> +
"Biology Marks:" + " " + studentDetails.biologyMarks + "<BR> +
"Maths Marks:" + " " + studentDetails.mathsMarks + "<BR> +
line );
else
return("
Records Not Found for ID " + id);
}
public String getStudentGrade()
{
int id = Integer.parseInt(studentID2.getText());
studentDetails.getStudentDetails(id);
String grade;
if(studentDetails.studentName == null)
{
System.out.println("
Records Not Found for ID " + id);
return null;
}
if(studentDetails.physicsMarks < passMarks ||
studentDetails.biologyMarks < passMarks ||
studentDetails.mathsMarks <
passMarks)
{
grade = "Failed";
}
else
{
int avgMarks = (studentDetails.physicsMarks +
studentDetails.biologyMarks + studentDetails.mathsMarks)/3;
if(avgMarks >= passMarks && avgMarks < secondClass) grade =
"Pass
Class";
else if(avgMarks >= secondClass && avgMarks < firstClass) grade
=<BR>Second Class";
else if(avgMarks >= firstClass && avgMarks < topScore) grade =
"First
Class";
else grade = "Distinction";
}
return(line + "Grade For " + studentDetails.studentName + " is "
+ grade
+ "<BR> + line);
}
public String getNumberPasses()
{
int lastID = Registration.getNextID() -1;
boolean passed = true;
int numberPassed = 0;
for(int id = 1; id <= lastID; id++)
{
studentDetails.getStudentDetails(id);
if(studentDetails.physicsMarks >= passMarks &&
studentDetails.biologyMarks >= passMarks &&
studentDetails.mathsMarks >=
passMarks) numberPassed++;
}
return(line + "Number of Student Passed: " + numberPassed +
"<BR> +
line);
}
public String getClassTopper()
{
int lastID = Registration.getNextID() -1;
String classTopper;
StringBuffer buffer = new StringBuffer(500);
int topMarks = 0;
for(int id = 1; id <= lastID; id++)
{
studentDetails.getStudentDetails(id);
int studentMarks = studentDetails.physicsMarks +
studentDetails.biologyMarks + studentDetails.mathsMarks;
if(studentMarks > topMarks) topMarks = studentMarks;
}
buffer.append(line + "Student Having Top Marks: <BR>);
for(int id = 1; id <= lastID; id++)
{
studentDetails.getStudentDetails(id);
int studentMarks = studentDetails.physicsMarks +
studentDetails.biologyMarks + studentDetails.mathsMarks;
if(studentMarks == topMarks)
{
buffer.append(studentDetails.studentName + " Having Total Marks:
" +
topMarks + "<BR>);
}
}
buffer.append(line);
return(buffer.toString());
}
public void stateChanged(ChangeEvent e)
{
switch(tabbedPane.getSelectedIndex())
{
case 3: studentPassed.setText(getNumberPasses());
break;
case 4: studentTopper.setText(getClassTopper());
break;
}
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource() == submitID1)
{
studentInfo.setText(getStudentInfo());
}
else if(e.getSource() == submitID2)
{
studentGrade.setText(getStudentGrade());
}
if(e.getSource() == submitDetails)
{
setStudentInfo();
}
}
}
//Registration Class
class Registration
{
private int topScore = 90;
private int passMarks = 35;
private int firstClass = 65;
private int secondClass = 45;
private static String idFile = "id.dat";
private static String studentFile = "studentfile.dat";
public int id;
public String studentName;
public int physicsMarks;
public int biologyMarks;
public int mathsMarks;
public int addStudent(String studentName, int physicsMarks, int
biologyMarks, int mathsMarks)
{
int id = 0;
try
{
FileWriter fileOutput = new
FileWriter(Registration.studentFile,true);
id = Registration.getNextID();
String buffer = id + "|" + studentName + "|" + physicsMarks +
"|" +
biologyMarks + "|" + mathsMarks + "<BR>;
fileOutput.write(buffer);
fileOutput.close();
Registration.setID(id);
}
catch(IOException e)
{
System.err.println(e.toString());
System.exit(1);
}
return id;
}
//Function to get the details of a student given the ID
public boolean getStudentDetails(int id)
{
try
{
FileReader fileInput = new FileReader(Registration.studentFile);
BufferedReader br = new BufferedReader(fileInput);
{
String str;
while((str = br.readLine()) != null)
{
StringTokenizer fields = new StringTokenizer(str,"|");
if(Integer.parseInt(fields.nextToken()) == id)
{
this.id = id;
this.studentName = fields.nextToken();
this.physicsMarks = Integer.parseInt(fields.nextToken());
this.biologyMarks = Integer.parseInt(fields.nextToken());
this.mathsMarks = Integer.parseInt(fields.nextToken());
return true;
}
}
}
}
catch(IOException e)
{
System.err.println(e.toString());
System.exit(1);
}
return false;
}
public int getTopScore()
{
return topScore;
}
public int getPassMarks()
{
return passMarks;
}
public int getFirstClass()
{
return firstClass;
}
public int getSecondClass()
{
return secondClass;
}
//Function to get the next ID available
public static int getNextID()
{
int id = 0;
try
{
RandomAccessFile studentIDFile = new
RandomAccessFile(Registration.idFile,"rw");
if(studentIDFile.length() == 0)
{
id = 0;
}
else id = studentIDFile.readInt();
id++;
studentIDFile.close();
}
catch(IOException e)
{
System.err.println(e.toString());
System.exit(1);
}
return id;
}
//Function to Store current ID in a file
public static void setID(int id)
{
try
{
RandomAccessFile studentIDFile = new
RandomAccessFile(Registration.idFile,"rw");
studentIDFile.seek(0);
studentIDFile.writeInt(id);
studentIDFile.close();
}
catch(IOException e)
{
System.err.println(e.toString());
System.exit(1);
}
}
} |
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123
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