Hey guys, what would be the best approach for this process:

public class Customer {
private List<Car> carList;
...
}

public class Car {
private String name;
..
}

So have an example
Peter bought a ferrari,

Customer peter = new Customer();
Car ferrari = new Car();
car.setName("ferrari")
peter.addCar(ferrari);
...
(call DB) session.save(peter)

unfortunately he did not like the car (Are u nuts, peter?)
so he sold it to Jack. What is the best way to do it?

I could do like:
ferrari = getFerrari();

jack = getCustomer();
jack.removeCar(ferrari);
(call DB) alterCustomer(jack)

* I just get Jack, remove the car and save it again.

Customer jack = new Customer();
jack.addCar(ferrari);
(call DB) session.save(jack)

* and I finally add the same Ferrari to Jack's object and save it.

Is there a easier or better way to do that?