Aplikasi Sederhana Password

/**
* Title : Program Aplikasi Sederhana
* Deskripsi : ini untuk sign in
*/

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

public class AplikasiPassword extends JFrame
{
private JLabel lblUser = new JLabel("User Name : ",JLabel.RIGHT);
private JLabel lblPass = new JLabel("Password : ",JLabel.RIGHT);
private JTextField txtUser = new JTextField("fitri");
private JPasswordField txtPass = new JPasswordField("fitri");
private JButton btnOK = new JButton ("OK");
private JButton btnCancel = new JButton("Cancel");
private Container c = new Container();

public AplikasiPassword()
{
super("contoh JPasswordField #2");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBackground(new Color(239,239,239));
setLocation(200,200);
setSize(235,105);

txtPass.setEchoChar('x');

c = getContentPane();
c.setLayout(new GridLayout(3,2));
c.add(lblUser);
c.add(txtUser);
c.add(lblPass);
c.add(txtPass);
c.add(btnOK);
c.add(btnCancel);

setVisible(true);
}

public static void main(String[] args)
{
new AplikasiPassword();
}
}