Hi everyone.I'm basically new to java but with the help of this forum i hope to get better.I'm currently busy with a user login interface project(see code below) and I'm a bit stuck now and i need help.
PROBLEM STATEMENT When the login button(submit) is clicked i want the program to connect to a db(which i have already acomplished),and after authentication i want it to dispose the full screen frame,set timerframe visible and launch the count down timer.when the counter reaches zero,the timerframe must dispose and the the full screen frame set visible. I also want to block out any special keys (e.g ctrl-alt-del , alt F4 ,alt Esc etc) i'm using the j2sdk1.4.2_04 version.
P.s Feel free to alter or add anything to the existing code. coments will be appreciated
//Entry class public static void main(String args[]) {
JFrame timerframe = new JFrame(); //Create a new JFrame called timerframe; JTextField username = new JTextField(10); //Create a JTextField called username JFrame frame = new JFrame("Login"); //Create a new JFrame called frame; JPasswordField password = new JPasswordField(8); //Create new JPasswordField - password; JLabel label = new JLabel(); //Create a JLabel called label JLabel labname = new JLabel( "Enter User Name: "); //Create a JLabel called labname JLabel labpass = new JLabel( "Enter Password: " ); //Create a JLabel called labpass JLabel emptyLabel1 = new JLabel(" "); //Create an Empty Label number 1 JLabel emptyLabel2 = new JLabel(" "); //Create an Empty Label number 2 JButton submit = new JButton("Login"); //Created a JButton called submit JButton exit = new JButton("Exit"); //Created a JButton called exit
label.setBackground(Color.WHITE); //Sets the background to white label.setForeground(Color.BLACK); //Sets the foreground to black label.setOpaque(true); label.setHorizontalAlignment(SwingConstants.CENTER);
username.setFont(new Font("Serif", Font.BOLD, 18)); //Set the username font type password.setFont(new Font("Serif", Font.BOLD, 24)); //Set the password font type
timerframe.setUndecorated(true); timerframe.setSize(185, 19); //Sets the size of the JFrame timerframe.getContentPane().add(label); timerframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setUndecorated(true);
frame.setBackground(Color.white); //Set Framebackground GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice(). setFullScreenWindow(frame); //Set Frame Size and position frame.getContentPane().setLayout(new GridBagLayout()); //set new layout
// submit.addActionListener(this); //*NB Error Line
exit.addActionListener(new ActionListener() { //This will set the action when the button is pressed on public void actionPerformed(ActionEvent ae) { //This would be the method that has to be overridden System.out.println("The Exit button was pushed"); System.exit(0); } });
submit.addActionListener(new ActionListener()
{ //This will set the action when the button is pressed on public void actionPerformed(ActionEvent ae) { //This would be the method that has to be overridden Connection connection = null; try { //This should connect to a database String driverName = "org.gjt.mm.mysql.Driver"; Class.forName(driverName); String serverName = "SEAL"; String mydatabase = "TEST"; //Database connection String url = "jdbc:mysql://" + serverName + "/" + mydatabase; String username = "BATTMAN"; String password = "SPIDERMAN"; connection = DriverManager.getConnection(url, username, password);
if(!connection.isClosed()) System.out.println("Successfully connected to MySQL server using TCP/IP...");
GridBagConstraints gbc = new GridBagConstraints(); //Setting a GridBagConstraints object
gbc.gridy = 0; //set y position gbc.gridx = 0; //set x position frame.getContentPane().add(labname, gbc); //Add JLabel "Username" To JFrame gbc.gridx = 1; //set x position frame.getContentPane().add(username, gbc); //Add JTextField "Username" To JFrame gbc.gridx = 2; //set x position gbc.gridx = 0; gbc.gridy = 1; //set y position
frame.getContentPane().add(emptyLabel1, gbc); //Add JLabel "Password" To JFrame gbc.gridx = 0; //set x position gbc.gridy = 2; frame.getContentPane().add(labpass, gbc); //Add JTextField Box "password" to JFrame
gbc.gridx = 1; //set y position frame.getContentPane().add(password, gbc); //Add empty label for space gbc.gridx = 0; //set x position gbc.gridy = 3; //set y position
frame.getContentPane().add(emptyLabel2, gbc); //Add empty label for space
gbc.gridy = 4; //set y position gbc.gridx = 1; //set x position frame.getContentPane().add(submit, gbc); //Add a submit JButton to the JFrame
gbc.gridy = 5; //set y position frame.getContentPane().add(exit, gbc); //Add an exit JButton to the JFrame
frame.setVisible(true); //setting the frame to display
new real(timerframe, label, frame).run(); //This will create a timerframe, and start it running.
}
public void run() { timerframe.setVisible(true); int x; for(x=60; x>0; --x) { //Changed the value to 2 minutes (was 60) label.setText("Min(s) remaining: " +x ); //This will set the text of the JLabel. try { Thread.sleep(60000); //This will sleep for a minute } catch(InterruptedException ie) { System.out.println("Error has occured: "+ie); } System.out.println("One minute has passed!"); } timerframe.dispose();
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