import
java.awt.*;
import
java.awt.event.*;
import
javax.swing.*;
class
InvalidPasswordException extends Exception
{}
class Slip17
extends JFrame implements ActionListener
{
JLabel name, pass;
JTextField nameText;
JPasswordField passText;
JButton login, end;
static int cnt=0;
Slip17()
{
name = new JLabel("Name :
");
pass = new JLabel("Password :
");
nameText = new JTextField(20);
passText = new JPasswordField(20);
login = new
JButton("Login");
end = new JButton("End");
login.addActionListener(this);
end.addActionListener(this);
setLayout(new GridLayout(3,2));
add(name);
add(nameText);
add(pass);
add(passText);
add(login);
add(end);
setTitle("Login Check");
setSize(300,300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==end)
{
System.exit(0);
}
if(e.getSource()==login)
{
try
{
String user =
nameText.getText();
String pass = new
String(passText.getPassword());
if(user.compareTo(pass)==0)
{
JOptionPane.showMessageDialog(null,"Login
Successful","Login",JOptionPane.INFORMATION_MESSAGE);
System.exit(0);
}
else
{
throw new InvalidPasswordException();
}
}
catch(Exception e1)
{
cnt++;
JOptionPane.showMessageDialog(null,"Login
Failed","Login",JOptionPane.ERROR_MESSAGE);
nameText.setText("");
passText.setText("");
nameText.requestFocus();
if(cnt == 3)
{
JOptionPane.showMessageDialog(null,"3 Attempts
Over","Login",JOptionPane.ERROR_MESSAGE);
System.exit(0);
}
}
}
}
public static void main(String args[])
{
new Slip17();
}
}
No comments:
Post a Comment