Crea una interfaz gráfica de login

public class InterfazLogin {
    public void crearInterfaz() {
        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(2, 2));
        JLabel userLabel = new JLabel("User");
        JTextField userText = new JTextField(6);
        JLabel passwordLabel = new JLabel("Password");
        JPasswordField passwordText = new JPasswordField(6);
        panel.add(userLabel);
        panel.add(userText);
        panel.add(passwordLabel);
        panel.add(passwordText);
        int input = JOptionPane.showConfirmDialog(null, panel, "Login", JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE);
        if (input == JOptionPane.OK_OPTION) {
            char[] password = passwordText.getPassword();
            String pwd = new String(password);
            if (userText.getText().equals("user1") && pwd.equals("password1