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import java.awt.*;
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import java.awt.event.*;
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import javax.swing.*;
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import java.sql.*;
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import javax.swing.JOptionPane;
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public class Login extends JFrame implements ActionListener {
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private Container container;
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private GridBagLayout layout;
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private GridBagConstraints gbc;
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private JButton cmdLogin, cmdCancel;
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private JLabel lblUSer, lblPassword;
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private JTextField txtUser;
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private JPasswordField txtPassword;
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public Login()
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{
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setTitle("Login Screen"); // or //super("Login window");
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setExtendedState(JFrame.MAXIMIZED_BOTH);
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setResizable(false); //disable resizing and Max button
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setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
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setSize(300,150);
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setLocationRelativeTo(null);
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container = getContentPane();
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layout = new GridBagLayout();
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container.setLayout(layout);
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gbc = new GridBagConstraints();
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lblUSer = new JLabel("Username:");
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gbc.insets = new Insets(2,2,2,2);
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container.add(lblUSer, gbc);
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txtUser = new JTextField(15);
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gbc.gridx = 1;
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gbc.gridwidth = 3;
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container.add(txtUser, gbc);
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lblPassword = new JLabel("Password:");
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gbc.gridy = 1;
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gbc.gridx = 0;
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gbc.gridwidth = 1;
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container.add(lblPassword, gbc);
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txtPassword = new JPasswordField(15);
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gbc.gridx = 1;
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gbc.gridwidth = 3;
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container.add(txtPassword, gbc);
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cmdLogin = new JButton("Login");
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cmdLogin.addActionListener( this );
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gbc.gridy = 2;
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gbc.gridx = 1;
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gbc.gridwidth = 1;
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container.add(cmdLogin, gbc);
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cmdCancel = new JButton("Cancel");
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cmdCancel.addActionListener( this );
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gbc.gridx = 2;
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container.add(cmdCancel, gbc);
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} //Login()
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public void actionPerformed(ActionEvent e){
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if(e.getActionCommand().equals("Login")){
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JOptionPane.showMessageDialog(null, "Wrong Username or Password, try again", "Warning !!!", JOptionPane.WARNING_MESSAGE);
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}
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else
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{
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//default icon, custom title
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int respond = JOptionPane.showConfirmDialog(null, "Would you like exiting the program ?", "Exiting", JOptionPane.YES_NO_OPTION);
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//System.out.println(respond);
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if(respond == 0){
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dispose (); //closing the frame
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}
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}
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} //actionPerformed()
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public static void connect()
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{
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Connection conn = null;
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try
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{
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String userName = "root";
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String password = "root";
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String url = "jdbc:mysql://localhost/Member";
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Class.forName ("com.mysql.jdbc.Driver").newInstance ();
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conn = DriverManager.getConnection (url, userName, password);
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System.out.println ("Database connection established");
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}
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catch (Exception e)
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{
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System.err.println ("Cannot connect to database server");
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}
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finally
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{
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if (conn != null)
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{
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try{
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conn.close ();
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System.out.println ("Database connection terminated");
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}
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catch (Exception e)
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{
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/* ignore close errors */
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}
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}
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}
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} //connect()
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public static void main(String args[]) {
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new Login().setVisible(true);
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connect();
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} //main()
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