PBO 7 (1)

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

/**
 * Class utama untuk menampilkan panel login.
 *
 * @author Thomas Felix
 * @version 5 Desember 2020
 */

public class Login {
    String Username = "thomasfelix";
    String Password = "bjirh3h3";
    String msg = " ";

    JTextField txtUsername = new JTextField(20);
    JTextField txtPassword = new JPasswordField(20);

    public static void main(String[] args){
        Login gui = new Login();
        gui.go();
    }

    public void go()
    {
        JFrame frame = new JFrame("Welcome to LoginPanel!");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel();

        JLabel lblUsername = new JLabel("Username:");
        JLabel lblPassword = new JLabel("Password:");

        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.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!";
                }
            }

            else
            {
                msg = "Login Denied!";
            }

            JOptionPane.showMessageDialog(null, msg);
        }
    }

    public class CancelListener implements ActionListener
    {
        public void actionPerformed(ActionEvent event)
        {
            txtUsername.setText("");
            txtPassword.setText("");
            txtUsername.requestFocus();
        }
    }
}