private void jButton1ActionPerformed(
     java.awt.event.ActionEvent evt) { // GEN-FIRST:event_jButton1ActionPerformed
   try {
     controlador.buscarProducto();
   } catch (ExpertoPuntoEquilibrioException ex) {
     Logger.getLogger(PantallaPuntoDeEquilibrio.class.getName()).log(Level.SEVERE, null, ex);
   }
 } // GEN-LAST:event_jButton1ActionPerformed
 private void botonListadoPEActionPerformed(
     java.awt.event.ActionEvent evt) { // GEN-FIRST:event_botonListadoPEActionPerformed
   controlador.listarPE();
 } // GEN-LAST:event_botonListadoPEActionPerformed