Previously we have seen how to create a simple registration form in the swing
I think MySQL software is one of the most popular open-source relational SQL database management systems in the world. MySQL is one of the best RDBMS being used for developing web-based software applications. The Database: A database is a separate application that stores a collection of data. Every database has one or more distinct APIs for creating, accessing, managing, searching and replicating the data it holds. RDBMS: The Relational Database Management System (RDBMS) is a software that enables you to implement a database with tables, columns, and indexes. It is sure that the Referential Integrity between rows of various tables. it's almost all Updates the indexes automatically. If we describe a SQL query we find that An SQL query and combine information from various tables.
In this Registration Form we will use some other packages, packages are:
java.swing.table.DefaultTableModel; DefaultTableModel returns a column class of Object. It is an implementation of TableModel that uses a Vector of Vectors to store the cell value objects.
A code like "java.sql.Connection" : It is a connection (session) with a specific database. These SQL statements are executed and results are returned within the context of a connection. The Connection object's database is able to provide information describing its tables.
java.sql.PreparedStatement:- The SQL statement is precompiled and stored in a PreparedStatement object. These objects can then be used to efficiently execute this statement multiple times.
java.sql.ResultSet:- A data table representing a database result set, which is usually generated by executing a statement that queries the database. Here the ResultSet object maintains a cursor pointing to its current row of data. In the beginning, the cursor is positioned before the first row. And the next method moves the cursor to the next row, and because it returns false when there are no more rows in the ResultSet object, it can be applied within a while loop to repeat through the result set.
java.sql.Statement:- An object used for executing a static SQL statement and returning the results it produces. In a general way, The only one ResultSet object per Statement object can be open at the same time. So, if the reading of one ResultSet object is interleaved with the reading of another, each must have been generated by different Statement objects. Each execution methods in the Statement interface implicitly close a statement current ResultSet object if an open one exists.
This is like - "java.awt.event":- These are provides interfaces and classes for dealing with different types of events fired by AWT components.
This is like - java.awt.Toolkit:- These classes are the abstract superclass of all actual implementations of the Abstract Window Toolkit. Where the Subclasses of the Toolkit class, are used to bind the various components to particular native toolkit implementations.
The code like - java.awt.Dimension:- A Dimension class encapsulates the width and height of a component (in integer precision) in a single object. A class is associated with certain properties of components. The several methods defined by the Component class and the LayoutManager interface return a Dimension object.
If, the connecting java application with the MySQL database, we need to follow steps to perform database connectivity: (In these examples we are using MySQL as the database. Therefore, we need to know following information's for the MySQL database):
The Driver class: A driver class for the MySQL database is com.mysql.jdbc.Driver.
The Connection URL: A connection URL for the MySQL database is JDBC:MySQL://localhost:3306/project where JDBC is the API, MySQL is the database, localhost is the server name on which MySQL is running, you may also use an IP address, 3306 is the port number and project is the database name. You may use any database, in such case, you need to replace the project with your database name.
Username: A default username for the MySQL database is root.
Password: A Password is given by the user at the time of installing the MySQL database. In that example, we are going to use the root as the password.
[ To connect java application with the MySQL database mysqlconnector.jar file is required to be loaded.]
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.Toolkit;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement; import java.sql.Statement;
import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.JTextField;
import javax.swing.table.DefaultTableModel;
@SuppressWarnings("serial")
public class RegistrationFormGUI extends JFrame
Connection con; Statement stmt; PreparedStatement preStatement,updatePreStmt;
JLabel title, idLabel, nameLabel, genderLabel, addressLabel, contactLabel;
JTextField idField, nameField, genderField, addressField, contactField;
JButton registerButton, exitButton,updateButton,deleteButton,resetButton,
refresh;
JRadioButton male, female; ButtonGroup bg;
JPanel panel; JTable table; DefaultTableModel model;
JScrollPane scrollpane; public RegistrationFormGUI() // TODO Auto-generated constructor stub
super("REGISTRATION FORM"); setSize(770, 420); setLayout(null);
// Calling connect method, this will connect us to database connect();
// Defining Labels
title = new JLabel("Registration Form");
title.setBounds(60, 7, 200, 30);
idLabel = new JLabel("ID");
idLabel.setBounds(30, 50, 60, 30);
nameLabel = new JLabel("Name");
nameLabel.setBounds(30, 85, 60, 30);
genderLabel = new JLabel("Gender");
genderLabel.setBounds(30, 120, 60, 30);
addressLabel = new JLabel("Address");
addressLabel.setBounds(30, 155, 60, 30);
contactLabel = new JLabel("Contact");
contactLabel.setBounds(30, 190, 60, 30);
// Defining ID field idField = new JTextField();
idField.setBounds(95, 50, 130, 30); idField.setEnabled(false);
// Defining Name field nameField = new JTextField();
nameField.setBounds(95, 85, 130, 30);
// Defining Gender Buttons male = new JRadioButton("Male");
male.setBounds(95, 120, 60, 30);
female = new JRadioButton("Female");female.setBounds(155, 120, 70, 30);
bg = new ButtonGroup();
bg.add(male);
bg.add(female);
addressField = new JTextField();
addressField.setBounds(95, 155, 130, 30);
contactField = new JTextField();
contactField.setBounds(95, 190, 130, 30);
// fixing all Label,TextField,RadioButton
add(title);
add(idLabel);
add(nameLabel);
add(genderLabel);
add(addressLabel);
add(contactLabel);
add(idField);
add(nameField);
add(male);
add(female);
add(addressField);
add(contactField);
// Defining Exit Button
exitButton = new JButton("Exit");
exitButton.setBounds(25, 250, 80, 25);
// Defining Register Button
registerButton = new JButton("Register");
registerButton.setBounds(110, 250, 100, 25);
// Defining Update Button
updateButton = new JButton("Update");
updateButton.setBounds(110, 285, 100, 25);
updateButton.setEnabled(false);
// Defining Delete Button
deleteButton = new JButton("Delete");
deleteButton.setBounds(25, 285, 80, 25);
deleteButton.setEnabled(false);
// Defining Reset Button
resetButton = new JButton("Reset");
resetButton.setBounds(60, 320, 100, 25);
resetButton.setEnabled(false);
// fixing all Buttons
add(exitButton);
add(registerButton);
add(updateButton);
add(deleteButton);
add(resetButton);
// Defining Panel
panel = new JPanel();
panel.setLayout(new GridLayout());
panel.setBounds(250, 20, 480, 330);
panel.setBorder(BorderFactory.createDashedBorder(Color.blue));
add(panel);
// Defining Refresh Button
refresh = new JButton("Refresh Table");
refresh.setBounds(350, 350, 270, 15);
add(refresh);
//Defining Model for table
model = new DefaultTableModel(); //Adding object of DefaultTableModel into JTable
table = new JTable(model);
//Fixing Columns move
table.getTableHeader().setReorderingAllowed(false);
// Defining Column Names on model
model.addColumn("S.No");
model.addColumn("ID");
model.addColumn("Name");
model.addColumn("Gender");
model.addColumn("Address"); model.addColumn("Contact");
// Enable Scrolling on table
scrollpane = new JScrollPane(table,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
panel.add(scrollpane);
//Displaying Frame in Center of the Screen
Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
this.setLocation(dim.width/2-this.getSize().width/2,
dim.height/2-this.getSize().height/2);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setResizable(false);
setVisible(true);
>
// Connection with Database
public void connect()
try
Class.forName("com.mysql.jdbc.Driver");
con =DriverManager.getConnection(
"jdbc:mysql://localhost:3306/test","root","1234");
stmt = con.createStatement();
preStatement = con.prepareStatement("insert into regForm(
name,gender,address,contact) values(. )");
>catch(Exception e)
System.out.print(e.getMessage());
>
>
>
DynamicRegForm Class – DynamicRegForm.java
import javax.swing.*;import javax.swing.table.DefaultTableModel;
import java.awt.event.*;
import java.sql.ResultSet;
@SuppressWarnings("serial")
public class DynamicRegForm extends RegistrationFormGUI
String gender = "";
ResultSet rst,rstLast;
Object[][] data;
int serialNo;
String SHOW = "Show";
RegistrationFormGUI formGUIObject;
// Defining Constructor
DynamicRegForm()
nameField.addKeyListener(new KeyAdapter()
public void keyTyped(KeyEvent e)
if(nameField.getText().length()>=15)
e.consume();
>
>);
male.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
gender = "Male";
> >);
female.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
gender = "Female";
>
>);
addressField.addKeyListener(new KeyAdapter()
public void keyTyped(KeyEvent e)
if(addressField.getText().length()>50)
e.consume();
>
>);
contactField.addKeyListener(new KeyAdapter()
public void keyTyped(KeyEvent e)
char c = e.getKeyChar();
if (!((c >= '0') && (c
(c == KeyEvent.VK_BACK_SPACE) ||
(c == KeyEvent.VK_DELETE)))
// getToolkit().beep();
e.consume();
>
if(contactField.getText().length()>9)
e.consume();
>
>);
exitButton.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent arg0)
try
con.close();
System.exit(0);
>catch(Exception ex)
System.out.println(ex.getMessage());
>
>
>);
registerButton.addActionListener(new AbstractAction(SHOW)
public void actionPerformed(ActionEvent ae)
try
if (ae.getSource() == registerButton)
if (nameField.getText().equals(""))
JOptionPane.showMessageDialog(idField,
"Please provide Name_Field");
else if(addressField.getText().equals(""))
JOptionPane.showMessageDialog(idField,
"Please provide Address_Field");
else if(contactField.getText().equals("")) JOptionPane.showMessageDialog(idField, "Please provide Contact_Field");
else if(gender.equals(""))
JOptionPane.showMessageDialog(idField, "Please select Gender");
else
//Fetching column values from Database
preStatement.setString(1,nameField.getText());
preStatement.setString(2,gender);
preStatement.setString(3,addressField.getText());
preStatement.setString(4,contactField.getText());
//Executing MySQL Update Query
int i = preStatement.executeUpdate();
if(i==1)
JOptionPane.showMessageDialog(panel,
"Successfully Registered");
>
// showing last row
rstLast = stmt.executeQuery("select *from regForm");
rstLast.last();
String string = serialNo++ +",
"+String.valueOf(rstLast.getLong(1))+",
"+rstLast.getString(2)+",
"+rstLast.getString(3)+",
"+rstLast.getString(4)+",
"+rstLast.getString(5);
Object[] row = null;
row = string.split(",");
model.addRow(row);
panel.revalidate();
// fields are blank
blankFields();
>
>
>catch(Exception ex)
System.out.println(ex.getMessage());
>
>
>);
updateButton.addActionListener(new AbstractAction(SHOW)
public void actionPerformed(ActionEvent e)
if (nameField.getText().equals(""))
JOptionPane.showMessageDialog(idField,
"Please provide Name_Field");
else if(addressField.getText().equals(""))
JOptionPane.showMessageDialog(idField,
"Please provide Address_Field");
else if(contactField.getText().equals(""))
JOptionPane.showMessageDialog(idField,
"Please provide Contact_Field");
else if(gender.equals(""))
JOptionPane.showMessageDialog(idField,
"Please select Gender");
else
int r = table.getSelectedRow();
try
if(r>=0)
if(male.isSelected())
gender = male.getText(); else gender = female.getText();
String > getValueAt(r,1);
updatePreStmt = con.prepareStatement(
"update regForm set name=?,
gender=?,address=?,contact=?
where
updatePreStmt.setString(1,nameField.getText());
updatePreStmt.setString(2,gender);
updatePreStmt.setString(3,addressField.getText());
updatePreStmt.setString(4,contactField.getText());
int i = updatePreStmt.executeUpdate();
if(i==1)
table.setValueAt(nameField.getText(),r,2);
table.setValueAt(gender, r, 3);
table.setValueAt(addressField.getText(),r,4);
table.setValueAt(contactField.getText(), r, 5);
>
else JOptionPane.showMessageDialog(panel,
"ID does't Exists in Database");
>
>catch(Exception ex)
System.out.println("Update section: "+
ex.getMessage());
>
>
>
>);
//Registering Anonymous Listener Class
deleteButton.addActionListener(new AbstractAction(SHOW)
public void actionPerformed(ActionEvent e)
try
//Getting Selected Row No
int r = table.getSelectedRow();
if(r>=0)
if (JOptionPane.showConfirmDialog(panel,
"Are you sure want to Delete this 'RECORD' ?","WARNING",
JOptionPane.YES_NO_OPTION) == JOptionPane.YES_OPTION)
String
// Executing MySQL Update Command
int i = stmt.executeUpdate("delete from regForm
where
if(i==1)
model.removeRow(r);
// fields are blank
blankFields();
registerButton.setEnabled(true);
deleteButton.setEnabled(false);
updateButton.setEnabled(false);
>
>
>
>catch(Exception ex)
System.out.println(ex.getMessage());
>
>
>);
//Registering Anonymous Listener Class
resetButton.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent arg0)
// calling method resetFields()
resetFields();
registerButton.setEnabled(true);
updateButton.setEnabled(false);
deleteButton.setEnabled(false);
resetButton.setEnabled(false);
>
>);
// Registering Anonymous Listener Class
refresh.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent arg0)
//calling refresh() method
refreshTable();
>
>);
//Registering Anonymous Listener Class
table.addMouseListener(new MouseListener()
public void mouseClicked(MouseEvent arg0)
//Getting Selected Row No
int r = table.getSelectedRow();
if(r>=0)
deleteButton.setEnabled(true);
updateButton.setEnabled(true);
resetButton.setEnabled(true);
registerButton.setEnabled(false);
//Fetching records from Table on Fields
idField.setText(""+table.getModel().getValueAt(r,1));
nameField.setText(""+table.getModel().getValueAt(r,2));
if(table.getModel().getValueAt(r,3).equals("Male"))
male.setSelected(true);
else
female.setSelected(true);
addressField.setText(""+table.getModel().getValueAt(r,4));
contactField.setText(""+table.getModel().getValueAt(r,5));
>
>
//@Override
public void mouseReleased(MouseEvent arg0) <>
//@Override
public void mousePressed(MouseEvent arg0) <>
// @Override
public void mouseExited(MouseEvent arg0) <>
//@Override
public void mouseEntered(MouseEvent arg0) <>
>);
// Displaying rows into the Frame table
addRows();
>
// addRows method
private void addRows()
try
Object[] row = null;
//Generating Serial No
serialNo=1;
rst = stmt.executeQuery("select *from regForm");
while(rst.next())
String string = serialNo++ +","+String.valueOf(rst.getLong(1))+",
"+rst.getString(2)+","+rst.getString(3)+",
"+rst.getString(4)+","+rst.getString(5);
row = string.split(",");
// Adding records in table model
model.addRow(row);
>
panel.revalidate();
>catch(Exception ex)
>
private void resetFields()
//calling method blankfields()
blankFields();
>
// refresh method
private void refreshTable()
// removing all the rows of the table
DefaultTableModel dm = (DefaultTableModel)table.getModel();
dm.getDataVector().removeAllElements();
System.out.println("Refresh Table");
//calling method addRows
addRows();
>
private void blankFields()
// fields will be blank
idField.setText("");
nameField.setText("");
gender = "";
bg.clearSelection();
addressField.setText("");
contactField.setText("");
>
// main() method
public static void main(String[] args)
new DynamicRegForm();
> >
