private void jTextFieldCUITFocusLost(
     java.awt.event.FocusEvent evt) { // GEN-FIRST:event_jTextFieldCUITFocusLost
   // TODO add your handling code here:
   if (Validar.controlCUIT(jTextFieldCUIT.getText())) {
     jTextFieldCUIT.setText(Validar.formatearCUIT(jTextFieldCUIT.getText()));
   } else {
     JOptionPane.showMessageDialog(
         null, "El CUIT ingresado no es válido", "¡Atención!", JOptionPane.INFORMATION_MESSAGE);
     jTextFieldCUIT.requestFocus();
   }
 } // GEN-LAST:event_jTextFieldCUITFocusLost