private class SalvarMercadoriaListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
try {
Mercadoria m = loadMercadoriaFromPanel();
MercadoriaDAO dao = new MercadoriaDAOJDBC();
dao.save(m);
setVisible(false);
resetForm();
SwingUtilities.invokeLater(framePrincipal.newAtualizaMercadoriasAction());