Hi all ,
I ve prepared a login form which contains two text boxes (one for "user name" and another for "password" ) and one "submit" button.I want to use key events.If I press enter key on "user name" textbox then the cursor will move to "password" textbox and if i press enter key on "apssword" textbox the cursor will shift to "submit" button.Following is the code.Can anybody tell me how to do it .Thanks in advance
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.sql.*;
import java.util.*;
import java.text.*;
public class Logon extends JFrame implements ActionListener {
private Dimension d = Toolkit.getDefaultToolkit().getScreenSize();//Getting the User's Screen Dimensions.
private JPanel pLog = new JPanel();
private JLabel lbUser, lbPass;
private JTextField txtUser;
private JPasswordField txtPass;
private JButton btnOk, btnCancel;
private Connection con;//For Creating the Connection Between Program & Database.
public
String user;//For Getting the Current User's Name
public Logon () {
//Setting Program's Title.
super ("Aanchal's Library System.");
//Setting the Main Window of Program.
setIconImage (getToolkit().getImage ("Images/Home.jpg"));//Setting the Program's Icon.
setSize (275, 150);//Setting Main Window Size.
setResizable (false);//Make it UnResizeable.
//Closing Code of Main Window.
addWindowListener (new WindowAdapter () {//Attaching the WindowListener to Program.
public void windowClosing (WindowEvent we) {//Overriding the windowClosing Function.
setVisible (false);//Hide the Form.
dispose(); //Free the System Resources.
System.exit (0); //Close the Application.
}
}
);
//Setting the Logon Form Position on User's Screen.
setLocation (d.width / 2 - getWidth() / 2, d.height / 2 - getHeight() / 2);
//Setting the Layout of Panel.
pLog.setBackground(new Color(180,240,200));
pLog.setLayout (null);
//Setting the Form's Labels.
lbUser = new JLabel ("Username:");
lbUser.setForeground (Color.black);
lbUser.setBounds (20, 15, 75, 25);
lbPass = new JLabel ("Password:");
lbPass.setForeground (Color.black);
lbPass.setBounds (20, 50, 75, 25);
//Setting the Form's TextField & PasswordField.
txtUser = new JTextField ();
txtUser.setBounds (100, 15, 150, 25);
txtPass = new JPasswordField ();
txtPass.setBounds (100, 50, 150, 25);
//Setting the Form's Buttons.
//btnOk = new JButton ("OK");
btnOk = new JButton (new ImageIcon ("Images/login.jpg"));
btnOk.setBackground(new Color(180,240,200));
btnOk.setBounds (45, 80, 67, 33);
btnOk.setToolTipText("Log In");
btnOk.addActionListener (this);
//btnCancel = new JButton ("Cancel");
btnCancel = new JButton (new ImageIcon ("Images/cancel.jpg"));
btnCancel.setBackground(new Color(180,240,200));
btnCancel.setBounds (150, 80, 67, 33);
btnCancel.setToolTipText("Cancel ");
btnCancel.addActionListener (this);
//Adding All the Controls in Panel.
pLog.add (lbUser);
pLog.add (lbPass);
pLog.add (txtUser);
pLog.add (txtPass);
pLog.add (btnOk);
pLog.add (btnCancel);
//Adding Panel to the Form.
getContentPane().add (pLog);
//Opening the Database.
try {
Class.forName ("sun.jdbc.odbc.JdbcOdbcDriver");
String loc = "jdbc
dbc:Library";
con = DriverManager.getConnection (loc);
}
catch (ClassNotFoundException cnf) {
JOptionPane.showMessageDialog (null, "Driver not Loaded...");
System.exit (0);
}
catch (SQLException sqlex) {
JOptionPane.showMessageDialog (null, "Unable to Connect to Database...");
System.exit (0);
}
//Showing The Logon Form.
setVisible (true);
}
public void actionPerformed (ActionEvent ae) {
Object obj = ae.getSource();
if (obj == btnOk) {//If OK Button Pressed.
String password = new String (txtPass.getPassword());
if (txtUser.getText().equals ("")) {
JOptionPane.showMessageDialog (this, "Provide Username to Logon.");
txtUser.requestFocus();
}
else if (password.equals ("")) {
txtPass.requestFocus();
JOptionPane.showMessageDialog (null,"Provide Password to Logon.");
}
else {
String pass;//To Hold the Password.
boolean verify = false;//To Confirm Logon.
try {//SELECT Query to Retrieved the Record.
String query = "SELECT * FROM Users WHERE Username = '" + txtUser.getText() + "'";
Statement st = con.createStatement ();//Creating Statement Object.
ResultSet rs = st.executeQuery (query);//Executing the Query.
rs.next();//Moving Towards the Record.
user = rs.getString ("Username");//Storing UserName.
pass = rs.getString ("Password");//Storing Password.
if (txtUser.getText().equals (user) && password.equals (pass)) {//If Found then.
verify = true;
new LibrarySystem (user, con);//Show Main Form.
setVisible (false);//Hide the Form.
dispose(); //Free the System Resources.
}
else {
verify = false;
JOptionPane.showMessageDialog (this, "Incorrect Information Provided.");
txtUser.setText ("");
txtPass.setText ("");
txtUser.requestFocus ();
}
}
catch (SQLException sqlex) {
if (verify == false) {
JOptionPane.showMessageDialog (this, "Incorrect Information Provided.");
txtUser.setText ("");
txtPass.setText ("");
txtUser.requestFocus ();
}
}
}
}
else if (obj == btnCancel) {//If Cancel Button Pressed Unload the From.
setVisible (false);
dispose();
System.exit (0);
}
}
}
