private void openForm1(){

form1.setPerson(form2.getPerson());
setContentPane(form1.getRootPanel());
form1.getRootPanel().revalidate();
form1.getRootPanel().repaint();

}

private void openForm2(){

form2.setPerson(form1.getPerson());
setContentPane(form2.getRootPanel2());
form2.getRootPanel2().revalidate();
form2.getRootPanel2().repaint();

}

//первая форма
public class Form1 {
    public JPanel getRootPanel() {
        return rootPanel;
    }

    private JPanel rootPanel;
    private JTextField familyTextField;
    private JTextField firstNameTextField;
    private JLabel familyLabel;
    private JLabel firstNameLabel;
    private JTextField lastNameTextField;
    private JLabel lastNameLabel;
    private JButton clickMeButton;
}


//вторая форма
public class Form2
{
    private JPanel rootPanel2;
    private JTextField fioTextField;
    private JButton switchButton2;
    private JProgressBar progressBar1;
}