Erro no Date Java [RESOLVIDO]

private void formWindowOpened(java.awt.event.WindowEvent evt) {                                  
    Date sistemaData = new Date();
    SimpleDateFormat formato = new SimpleDateFormat ("dd MMMM YYYY");
    data.setText(formato.format(sistemaData));
    
    //Hora do Sistema
    Timer hr = new Timer(100, new MenuPrincipal.horas());
    hr.start();
}