Write a Java program to design a screen using Awt that will take a user name and password. If the user name and password are not same, raise an Exception with appropriate message. User can have 3 login chances only. Use clear button to clear the TextFields.

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class facebookq extends JFrame implements ActionListener{
JPanel p,p1,p2;
JLabel name,pass;
String a,b;
int attempts=0; 
JTextField t1,t2;
JButton b1,b2;

	public facebookq() {
	setTitle("Facebook");
	setSize(800,760);
	GridBagLayout gb=new GridBagLayout();
	GridBagConstraints c = new GridBagConstraints();
	setLayout(gb);
	window close=new window();
	addWindowListener(close);
	p = new JPanel();
	c.gridx=1; c.gridy=1;
	gb.setConstraints(p,c);
	add(p);

	name = new JLabel("username");
	c.gridx=1; c.gridy=1;
	gb.setConstraints(name,c);
	p.add(name);
	
	t1 = new JTextField(20);
	c.gridx=1; c.gridy=2;
	gb.setConstraints(t1,c);
	p.add(t1);

	p1 = new JPanel();
	c.gridx=1; c.gridy=2;
	gb.setConstraints(p1,c);
	add(p1);

	pass= new JLabel("Password");
	c.gridx=1; c.gridy=2;
	gb.setConstraints(pass,c);
	p1.add(pass);
	
	t2 = new JTextField(20);
	c.gridx=1; c.gridy=2;
	gb.setConstraints(t2,c);
	p1.add(t2);
	
	p2 = new JPanel();
	c.gridx=1; c.gridy=3;
	gb.setConstraints(p2,c);
	add(p2);

	b1=new JButton("LOGIN");
	c.gridx=1; c.gridy=3;
	gb.setConstraints(b1,c);
	p2.add(b1);
	
	b2=new JButton("CLEAR");
	c.gridx=1; c.gridy=4;
	gb.setConstraints(b2,c);
	p2.add(b2);

	b1.addActionListener(this);
	b2.addActionListener(this);
}

class LoginException extends Exception {
   LoginException() {
JOptionPane.showMessageDialog(null, "Exception!!! Invalid Username or Password");
    
   }
}

public void actionPerformed(ActionEvent e)
{                                    //open main
String cmd=e.getActionCommand();

try{                         //open try
if (cmd.equals("LOGIN"))
{
a=t1.getText();
b=t2.getText();
if ((a.equals("mk")) && (b.equals("mk")))
{

JOptionPane.showMessageDialog(null, "Suffesfully Done");

}
else 
 { 

 attempts++; 
 if(attempts>=3) 
{
 b1.setEnabled(false);
JOptionPane.showMessageDialog(null, "Limit is exceeded Try After Sometime");
} 
else
{
throw new LoginException();
}
} 
}

} //close try



catch (Exception er){}

if (cmd.equals("CLEAR"))
{
t1.setText("");
t2.setText("");
}

} //close main


public class window extends WindowAdapter
{
public void windowClosing(WindowEvent e)
{
	System.exit(0);
}
}

public static void main(String a[])
{
facebookq fb=new facebookq();
fb.setVisible(true);
}
}