Methode greift nicht auf JTextPanel zu

Code (Java):

public class TimeLimit extends JFrame {

    private JPanel contentPane;
    private JPasswordField passwordField;
    private JTextPane txtpnPasswort;
    private JPasswordField passwordField_1;

    /**
    * Launch the application.
    */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    TimeLimit frame = new TimeLimit();...

Methode greift nicht auf JTextPanel zu

Methode greift nicht auf JTextPanel zu