Login.java

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

public class Login{
    String Username = "rahandi";
    String Password = "rahandi";
    String msg = " ";
    JTextField txtUsername = null;
    JTextField txtPassword = null;
    
    public static void main(String[] args){
        Login gui = new Login();
        gui.go();
    }
    
    public void go(){
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JPanel panel = new JPanel();
        JLabel lblUsername = new JLabel("Username:");
        JLabel lblPassword = new JLabel("Password:");
        txtUsername = new JTextField(20);
        txtPassword = new JTextField(20);
        JButton btnLogin = new JButton("Login");
        btnLogin.addActionListener(new LoginListener());
        JButton btnCancel = new JButton("Cancel");
        btnCancel.addActionListener(new CancelListener());
        panel.add(lblUsername);
        panel.add(txtUsername);
        panel.add(lblPassword);
        panel.add(txtPassword);
        panel.add(btnLogin);
        panel.add(btnCancel);
        frame.getContentPane().add(BorderLayout.CENTER, panel);
        frame.getRootPane().setDefaultButton(btnLogin);
        frame.setSize(300, 300);
        frame.setVisible(true);
    }
    
    public class LoginListener implements ActionListener{
        public void actionPerformed(ActionEvent event){
            if(Username.equals(txtUsername.getText())){
                if(Password.equals(txtPassword.getText())){
                    msg = "Login Granted";
                }
                else{
                    msg = "Login Denied";
                }
                JOptionPane.showMessageDialog(null, msg);
            }
        }
    }
    
    public class CancelListener implements ActionListener{
        public void actionPerformed(ActionEvent event){
            txtUsername.setText("");
            txtPassword.setText("");
            txtUsername.requestFocus();
        }
    }
}