Here is a simple CRUD application that I named Student Information System in Swing Java that I wrote using Java programming language. Which allows the user to add, update, view and delete student records. All the student records in being store in a text file. The application is very basic and simple for learners to understand how Swing library in Java works. I hope you will find my work useful. I enjoy every minute working in this sample program. By the way I am using Netbeans as my tool in developing this program. Thank you.
My email address are the following jakerpomperada@gmail.com and jakerpomperada@yahoo.com.
My mobile number here in the Philippines is 09173084360.
Sample Program Output
Program Listing
Student.java
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package student_info_system;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import javax.swing.JOptionPane;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;
/**
*
* @author Jake R. Pomperada, MAED-IT
* Date: July 1, 2017, Saturday
* Email : jakerpomperada@gmail.com and jakerpomperada@outlook.com
*/
public class Student extends javax.swing.JFrame {
/**
* Creates new form Student
*/
public Student() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
jTable1 = new javax.swing.JTable();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
jLabel4 = new javax.swing.JLabel();
txtID = new javax.swing.JTextField();
txtFirstName = new javax.swing.JTextField();
txtMiddleName = new javax.swing.JTextField();
txtCourse = new javax.swing.JTextField();
btnAdd = new javax.swing.JButton();
btnClear = new javax.swing.JButton();
btnQuit = new javax.swing.JButton();
jScrollPane2 = new javax.swing.JScrollPane();
Table = new javax.swing.JTable();
btnUpdate = new javax.swing.JButton();
btnDelete = new javax.swing.JButton();
jLabel5 = new javax.swing.JLabel();
jLabel6 = new javax.swing.JLabel();
txtLastName = new javax.swing.JTextField();
jTable1.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{null, null, null, null},
{null, null, null, null},
{null, null, null, null},
{null, null, null, null}
},
new String [] {
"Title 1", "Title 2", "Title 3", "Title 4"
}
));
jScrollPane1.setViewportView(jTable1);
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setBackground(new java.awt.Color(204, 204, 204));
addWindowListener(new java.awt.event.WindowAdapter() {
public void windowOpened(java.awt.event.WindowEvent evt) {
formWindowOpened(evt);
}
});
jLabel1.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
jLabel1.setText("Student ID");
jLabel2.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
jLabel2.setText("First Name");
jLabel3.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
jLabel3.setText("Middle Name");
jLabel4.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
jLabel4.setText("Last Name");
txtFirstName.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
txtFirstNameActionPerformed(evt);
}
});
txtCourse.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
txtCourseActionPerformed(evt);
}
});
btnAdd.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
btnAdd.setText("Add");
btnAdd.setToolTipText("Click here to save student records.");
btnAdd.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnAddActionPerformed(evt);
}
});
btnClear.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
btnClear.setText("Clear");
btnClear.setToolTipText("Click here to clear the text box.");
btnClear.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnClearActionPerformed(evt);
}
});
btnQuit.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
btnQuit.setText("Quit ");
btnQuit.setToolTipText("Click here to quit the program");
btnQuit.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnQuitActionPerformed(evt);
}
});
Table.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
},
new String [] {
}
));
Table.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
TableMouseClicked(evt);
}
});
jScrollPane2.setViewportView(Table);
btnUpdate.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
btnUpdate.setText("Update");
btnUpdate.setToolTipText("Click here to update the student record.");
btnUpdate.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnUpdateActionPerformed(evt);
}
});
btnDelete.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
btnDelete.setText("Delete");
btnDelete.setToolTipText("Click here to remove the student record.");
btnDelete.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnDeleteActionPerformed(evt);
}
});
jLabel5.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
jLabel5.setText("Course");
jLabel6.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
jLabel6.setText("Student Information System");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(20, 20, 20)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jLabel6, javax.swing.GroupLayout.PREFERRED_SIZE, 411, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(0, 91, Short.MAX_VALUE))
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel1)
.addComponent(jLabel2)
.addComponent(jLabel3)
.addComponent(jLabel4)
.addComponent(jLabel5, javax.swing.GroupLayout.PREFERRED_SIZE, 60, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(30, 30, 30)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(txtID)
.addComponent(txtFirstName)
.addComponent(txtMiddleName)
.addComponent(txtCourse, javax.swing.GroupLayout.DEFAULT_SIZE, 143, Short.MAX_VALUE)
.addComponent(txtLastName))
.addGap(26, 26, 26)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(btnClear, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(btnUpdate, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(btnAdd, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(btnDelete, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(btnQuit, javax.swing.GroupLayout.PREFERRED_SIZE, 67, javax.swing.GroupLayout.PREFERRED_SIZE))))
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane2)))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(20, 20, 20)
.addComponent(jLabel6)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel1)
.addComponent(txtID, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(btnAdd))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(txtFirstName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(btnUpdate))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(txtMiddleName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel3)
.addComponent(btnDelete))
.addGap(32, 32, 32)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel4)
.addComponent(txtLastName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel5)
.addComponent(txtCourse, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(btnClear)
.addComponent(btnQuit))
.addGap(18, 18, 18)
.addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 138, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(20, 20, 20))
);
pack();
}// </editor-fold>
private void txtFirstNameActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
DefaultTableModel mod;
String Id, FirstName, MiddleName, LastName,Course, line;
private void formWindowOpened(java.awt.event.WindowEvent evt) {
mod = (DefaultTableModel)Table.getModel();
mod.addColumn("ID");
mod.addColumn("FIRST NAME");
mod.addColumn("MIDDLE NAME");
mod.addColumn("LAST NAME");
mod.addColumn("COURSE");
try{
BufferedReader bfw = new BufferedReader(new FileReader("student_db.txt"));
while( (line = bfw.readLine() ) != null ) {
mod.addRow( line.split(",") );
}
bfw.close();
}
catch(Exception ex){
}
}
private void btnAddActionPerformed(java.awt.event.ActionEvent evt) {
this.Id = txtID.getText().toUpperCase();
this.FirstName = txtFirstName.getText().toUpperCase();
this.MiddleName = txtMiddleName.getText().toUpperCase();
this.LastName = txtLastName.getText().toUpperCase();
this.Course = txtCourse.getText().toUpperCase();
this.txtID.setText("");
this.txtFirstName.setText("");
this.txtMiddleName.setText("");
this.txtLastName.setText("");
this.txtCourse.setText("");
String st[] = {Id, FirstName, MiddleName, LastName,Course};
mod.addRow(st);
saveFile();
this.txtID.requestFocus();
}
private void saveFile(){
try{
File file = new File("student_db.txt");
if(!file.exists()){
file.createNewFile();
}
FileWriter fw = new FileWriter(file.getAbsoluteFile());
BufferedWriter bw = new BufferedWriter(fw);
for(int i=0; i<Table.getRowCount(); i++){
for(int j=0; j<Table.getColumnCount(); j++){
bw.write((String)Table.getModel().getValueAt(i,j)+",");
}
bw.write("\n");
}
bw.close();
fw.close();
}catch(Exception ex){
}
}
private void btnQuitActionPerformed(java.awt.event.ActionEvent evt) {
String message = "Do you want to quit the program?";
String title = "Really Program Quit?";
int reply = JOptionPane.showConfirmDialog(null, message, title, JOptionPane.YES_NO_OPTION);
if (reply ==JOptionPane.NO_OPTION)
{
this.txtID.setText("");
this.txtFirstName.setText("");
this.txtMiddleName.setText("");
this.txtLastName.setText("");
this.txtCourse.setText("");
this.txtID.requestFocus();
}
if (reply == JOptionPane.YES_OPTION)
{
System.exit(0);
}
}
private void TableMouseClicked(java.awt.event.MouseEvent evt) {
int index =Table.getSelectedRow();
TableModel model = Table.getModel();
Id = model.getValueAt(index, 0).toString().toUpperCase();
FirstName = model.getValueAt(index, 1).toString().toUpperCase();
MiddleName = model.getValueAt(index, 2).toString().toUpperCase();
LastName = model.getValueAt(index, 3).toString().toUpperCase();
Course = model.getValueAt(index, 4).toString().toUpperCase();
txtID.setText(Id);
txtFirstName.setText(FirstName);
txtMiddleName.setText(MiddleName);
txtLastName.setText(LastName);
txtCourse.setText(Course);
}
private void btnUpdateActionPerformed(java.awt.event.ActionEvent evt) {
mod = (DefaultTableModel) Table.getModel();
if(Table.getSelectedRow()==-1){
if(Table.getRowCount()==0){
JOptionPane.showMessageDialog(rootPane,"Table is Empty");
}else{
JOptionPane.showMessageDialog(rootPane, "You must select a record");
}
}else{
mod.setValueAt(txtID.getText().toUpperCase(),Table.getSelectedRow(), 0);
mod.setValueAt(txtFirstName.getText().toUpperCase(), Table.getSelectedRow(), 1);
mod.setValueAt(txtMiddleName.getText().toUpperCase(), Table.getSelectedRow(), 2);
mod.setValueAt(txtLastName.getText().toUpperCase(), Table.getSelectedRow(), 3);
mod.setValueAt(txtCourse.getText().toUpperCase(), Table.getSelectedRow(), 4);
}
saveFile();
}
private void btnDeleteActionPerformed(java.awt.event.ActionEvent evt) {
mod = (DefaultTableModel) Table.getModel();
if(Table.getSelectedRow()==-1){
if(Table.getRowCount()==0){
JOptionPane.showMessageDialog(rootPane,"Table is Empty");
}else{
JOptionPane.showMessageDialog(rootPane, "You must select a record");
}
}else{
JOptionPane.showMessageDialog(rootPane, "Record is deleted!");
mod.removeRow(Table.getSelectedRow());
this.txtID.setText("");
this.txtFirstName.setText("");
this.txtMiddleName.setText("");
this.txtLastName.setText("");
this.txtCourse.setText("");
this.txtID.requestFocus();
}
saveFile();
}
private void txtCourseActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void btnClearActionPerformed(java.awt.event.ActionEvent evt) {
this.txtID.setText("");
this.txtFirstName.setText("");
this.txtMiddleName.setText("");
this.txtLastName.setText("");
this.txtCourse.setText("");
this.txtID.requestFocus();
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(Student.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Student.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Student.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Student.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Student().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JTable Table;
private javax.swing.JButton btnAdd;
private javax.swing.JButton btnClear;
private javax.swing.JButton btnDelete;
private javax.swing.JButton btnQuit;
private javax.swing.JButton btnUpdate;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JLabel jLabel4;
private javax.swing.JLabel jLabel5;
private javax.swing.JLabel jLabel6;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JTable jTable1;
private javax.swing.JTextField txtCourse;
private javax.swing.JTextField txtFirstName;
private javax.swing.JTextField txtID;
private javax.swing.JTextField txtLastName;
private javax.swing.JTextField txtMiddleName;
// End of variables declaration
}
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