JPanel p = new JPanel();
p.setLayout(new GridLayout(2, 2, 2, 2));
p.add(new JLabel("Username"));
p.add(new JTextField());
p.add(new JLabel("Password"));
p.add(new JPasswordField());
Container content = getContentPane();
content.setLayout(new GridBagLayout()); // Used to center the panel
content.add(p);
