JAVA: Pop up a dialog box for user input

JTextField firstName = new JTextField();
JTextField lastName = new JTextField();
JPasswordField password = new JPasswordField();
final JComponent[] inputs = new JComponent[] {
                new JLabel("First"),
                firstName,
                new JLabel("Last"),
                lastName,
                new JLabel("Password"),
                password};

 
JOptionPane.showMessageDialog(null, inputs, "My custom dialog", JOptionPane.PLAIN_MESSAGE);
System.out.println("You entered " +
                firstName.getText() + ", " +
                lastName.getText() + ", " +
                password.getText());