Java Code - Insert Update Delete And Show Records In JTable Using NetBeans .
In this java Tutorial we will see How To Insert , Update And Delete Record From MySQL Database And Display Data In JTable Using NetBeans .
*Java Courses : Java Complete Course Java Swing Course
Part 1
Part 2
Create A Class And Call It User :
package JAVA_VIDEOS_TUTORIALS;
public class User {
private int id;
private String firstName;
private String lastName;
private int age;
public User(int ID, String FirstName, String LastName, int Age)
{
this.id = ID;
this.firstName = FirstName;
this.lastName = LastName;
this.age = Age;
}
public int getId()
{
return id;
}
public String getFirstName()
{
return firstName;
}
public String getLastNAme()
{
return lastName;
}
public int getAge()
{
return age;
}
}
Methods :
- Method "getConnection" This Method Return The Connection :
public Connection getConnection()
{
Connection con;
try {
con = DriverManager.getConnection("jdbc:mysql://localhost/test_db", "root","");
return con;
}
catch (Exception e) {
e.printStackTrace();
return null;
}
}
- Method "getUsersList" This Method Populate An ArrayList Of User With Data From Mysql Database And Return This ArrayList :
public ArrayList<User> getUsersList()
{
ArrayList<User> usersList = new ArrayList<User>();
Connection connection = getConnection();
String query = "SELECT * FROM `users` ";
Statement st;
ResultSet rs;
try {
st = connection.createStatement();
rs = st.executeQuery(query);
User user;
while(rs.next())
{
user = new User(rs.getInt("id"),rs.getString("fname"),rs.getString("lname"),rs.getInt("age"));
usersList.add(user);
}
}
catch (Exception e) {
e.printStackTrace();
}
return usersList;
}
- Method "Show_Users_In_JTable" This Method Display Data In JTable Using The ArrayList Returned By "getUsersList" :
public void showItem(int index)
{
jTextField_id.setText(getItemsList().get(index).getId());
jTextField_name.setText(getItemsList().get(index).getName());
jTextArea_description.setText(getItemsList().get(index).getDescription());
ImageIcon icon = new ImageIcon(getItemsList().get(index).getImage());
Image image = icon.getImage().getScaledInstance(jLabel_image.getWidth(),
jLabel_image.getHeight(), Image.SCALE_SMOOTH);
jLabel_image.setIcon(new ImageIcon(image));
}
- Method "executeSQlQuery" This Method Take Two Parameters One Is The Sql Query To Execute ( Insert, Update, Delete) In MySQL Database And The Other Is The Message To Diplay , And Refresh The JTable Data With The New Data :
public void executeSQlQuery(String query, String message)
{
Connection con = getConnection();
Statement st;
try{
st = con.createStatement();
if((st.executeUpdate(query)) == 1)
{
// refresh jtable data
DefaultTableModel model = (DefaultTableModel)jTable_Display_Users.getModel();
model.setRowCount(0);
Show_Users_In_JTable();
JOptionPane.showMessageDialog(null, "Data "+message+" Succefully");
}else{
JOptionPane.showMessageDialog(null, "Data Not "+message);
}
}catch(Exception ex){
ex.printStackTrace();
}
}
Project Source Code :
package JAVA_VIDEOS_TUTORIALS;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
import javax.swing.JOptionPane;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;
/**
*
* @author 1bestcsharp.blogspot.com
*/
public class Java_Insert_Update_Delete_Display extends javax.swing.JFrame {
/**
* Creates new form Java_Insert_Update_Delete_Display
*/
public Java_Insert_Update_Delete_Display() {
initComponents();
Show_Users_In_JTable();
}
// get the connection
public Connection getConnection()
{
Connection con;
try {
con = DriverManager.getConnection("jdbc:mysql://localhost/test_db", "root","");
return con;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
// get a list of users from mysql database
public ArrayList<User> getUsersList()
{
ArrayList<User> usersList = new ArrayList<User>();
Connection connection = getConnection();
String query = "SELECT * FROM `users` ";
Statement st;
ResultSet rs;
try {
st = connection.createStatement();
rs = st.executeQuery(query);
User user;
while(rs.next())
{
user = new User(rs.getInt("id"),rs.getString("fname"),rs.getString("lname"),rs.getInt("age"));
usersList.add(user);
}
} catch (Exception e) {
e.printStackTrace();
}
return usersList;
}
// Display Data In JTable
public void Show_Users_In_JTable()
{
ArrayList<User> list = getUsersList();
DefaultTableModel model = (DefaultTableModel)jTable_Display_Users.getModel();
Object[] row = new Object[4];
for(int i = 0; i < list.size(); i++)
{
row[0] = list.get(i).getId();
row[1] = list.get(i).getFirstName();
row[2] = list.get(i).getLastNAme();
row[3] = list.get(i).getAge();
model.addRow(row);
}
}
// Execute The Insert Update And Delete Querys
public void executeSQlQuery(String query, String message)
{
Connection con = getConnection();
Statement st;
try{
st = con.createStatement();
if((st.executeUpdate(query)) == 1)
{
// refresh jtable data
DefaultTableModel model = (DefaultTableModel)jTable_Display_Users.getModel();
model.setRowCount(0);
Show_Users_In_JTable();
JOptionPane.showMessageDialog(null, "Data "+message+" Succefully");
}else{
JOptionPane.showMessageDialog(null, "Data Not "+message);
}
}catch(Exception ex){
ex.printStackTrace();
}
}
/**
* 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() {
jPanel1 = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
jLabel4 = new javax.swing.JLabel();
jTextField_Id = new javax.swing.JTextField();
jTextField_FirstName = new javax.swing.JTextField();
jTextField_LastName = new javax.swing.JTextField();
jTextField_Age = new javax.swing.JTextField();
jScrollPane1 = new javax.swing.JScrollPane();
jTable_Display_Users = new javax.swing.JTable();
jButton_Insert = new javax.swing.JButton();
jButton_Update = new javax.swing.JButton();
jButton_Delete = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jPanel1.setBackground(new java.awt.Color(204, 204, 204));
jLabel1.setFont(new java.awt.Font("Verdana", 0, 18)); // NOI18N
jLabel1.setText("Id:");
jLabel2.setFont(new java.awt.Font("Verdana", 0, 18)); // NOI18N
jLabel2.setText("First Name:");
jLabel3.setFont(new java.awt.Font("Verdana", 0, 18)); // NOI18N
jLabel3.setText("Last Name:");
jLabel4.setFont(new java.awt.Font("Verdana", 0, 18)); // NOI18N
jLabel4.setText("Age:");
jTextField_Id.setFont(new java.awt.Font("Verdana", 0, 14)); // NOI18N
jTextField_FirstName.setFont(new java.awt.Font("Verdana", 0, 14)); // NOI18N
jTextField_FirstName.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField_FirstNameActionPerformed(evt);
}
});
jTextField_LastName.setFont(new java.awt.Font("Verdana", 0, 14)); // NOI18N
jTextField_LastName.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField_LastNameActionPerformed(evt);
}
});
jTextField_Age.setFont(new java.awt.Font("Verdana", 0, 14)); // NOI18N
jTextField_Age.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField_AgeActionPerformed(evt);
}
});
jTable_Display_Users.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
},
new String [] {
"Id", "First Name", "Last Name", "Age"
}
));
jTable_Display_Users.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
jTable_Display_UsersMouseClicked(evt);
}
});
jScrollPane1.setViewportView(jTable_Display_Users);
jButton_Insert.setFont(new java.awt.Font("Verdana", 1, 14)); // NOI18N
jButton_Insert.setIcon(new javax.swing.ImageIcon(getClass().getResource("/JAVA_VIDEOS_TUTORIALS/icons/add.png"))); // NOI18N
jButton_Insert.setText("Insert");
jButton_Insert.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton_InsertActionPerformed(evt);
}
});
jButton_Update.setFont(new java.awt.Font("Verdana", 1, 14)); // NOI18N
jButton_Update.setIcon(new javax.swing.ImageIcon(getClass().getResource("/JAVA_VIDEOS_TUTORIALS/icons/Refresh.png"))); // NOI18N
jButton_Update.setText("Update");
jButton_Update.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton_UpdateActionPerformed(evt);
}
});
jButton_Delete.setFont(new java.awt.Font("Verdana", 1, 14)); // NOI18N
jButton_Delete.setIcon(new javax.swing.ImageIcon(getClass().getResource("/JAVA_VIDEOS_TUTORIALS/icons/delete.png"))); // NOI18N
jButton_Delete.setText("Delete");
jButton_Delete.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton_DeleteActionPerformed(evt);
}
});
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(33, 33, 33)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel4)
.addComponent(jLabel3))
.addGap(12, 12, 12))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel2)
.addComponent(jLabel1))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)))
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jTextField_Id, javax.swing.GroupLayout.PREFERRED_SIZE, 129, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jTextField_FirstName, javax.swing.GroupLayout.PREFERRED_SIZE, 129, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jTextField_LastName, javax.swing.GroupLayout.PREFERRED_SIZE, 129, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jTextField_Age, javax.swing.GroupLayout.PREFERRED_SIZE, 129, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jButton_Insert)
.addGap(18, 18, 18)
.addComponent(jButton_Update)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 20, Short.MAX_VALUE)
.addComponent(jButton_Delete)))
.addGap(18, 18, 18)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 409, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap())
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(36, 36, 36)
.addComponent(jLabel1))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jTextField_Id, javax.swing.GroupLayout.PREFERRED_SIZE, 35, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGap(11, 11, 11)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(jTextField_FirstName, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel3)
.addComponent(jTextField_LastName, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel4)
.addComponent(jTextField_Age, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(75, 75, 75)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jButton_Insert, javax.swing.GroupLayout.PREFERRED_SIZE, 46, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jButton_Update, javax.swing.GroupLayout.PREFERRED_SIZE, 46, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jButton_Delete, javax.swing.GroupLayout.PREFERRED_SIZE, 46, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(192, 192, 192))
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
pack();
}// </editor-fold>
private void jTextField_FirstNameActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void jTextField_LastNameActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void jTextField_AgeActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void jTable_Display_UsersMouseClicked(java.awt.event.MouseEvent evt) {
// Get The Index Of The Slected Row
int i = jTable_Display_Users.getSelectedRow();
TableModel model = jTable_Display_Users.getModel();
jTextField_Id.setText(model.getValueAt(i,0).toString());
jTextField_FirstName.setText(model.getValueAt(i,1).toString());
jTextField_LastName.setText(model.getValueAt(i,2).toString());
jTextField_Age.setText(model.getValueAt(i,3).toString());
}
// Button Insert
private void jButton_InsertActionPerformed(java.awt.event.ActionEvent evt) {
String query = "INSERT INTO `users`(`fname`, `lname`, `age`) VALUES ('"+jTextField_FirstName.getText()+"','"+jTextField_LastName.getText()+"',"+jTextField_Age.getText()+")";
executeSQlQuery(query, "Inserted");
}
// Button Update
private void jButton_UpdateActionPerformed(java.awt.event.ActionEvent evt) {
String query = "UPDATE `users` SET `fname`='"+jTextField_FirstName.getText()+"',`lname`='"+jTextField_LastName.getText()+"',`age`="+jTextField_Age.getText()+" WHERE `id` = "+jTextField_Id.getText();
executeSQlQuery(query, "Updated");
}
// Button Delete
private void jButton_DeleteActionPerformed(java.awt.event.ActionEvent evt) {
String query = "DELETE FROM `users` WHERE id = "+jTextField_Id.getText();
executeSQlQuery(query, "Deleted");
}
/**
* @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(Java_Insert_Update_Delete_Display.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Java_Insert_Update_Delete_Display.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Java_Insert_Update_Delete_Display.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Java_Insert_Update_Delete_Display.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 Java_Insert_Update_Delete_Display().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton_Delete;
private javax.swing.JButton jButton_Insert;
private javax.swing.JButton jButton_Update;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JLabel jLabel4;
private javax.swing.JPanel jPanel1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable jTable_Display_Users;
private javax.swing.JTextField jTextField_Age;
private javax.swing.JTextField jTextField_FirstName;
private javax.swing.JTextField jTextField_Id;
private javax.swing.JTextField jTextField_LastName;
// End of variables declaration
}
///////////////OUTPUT:
