@Entity public class Customer implements Serializable { private String id; private String firstName; private String lastName; private Address address; public Customer() {...} public Customer(String id, String firstName, String lastName) {...} @Id public String getCustomerId() {...} public synchronized void setCustomerId(String id) {...} public String getFirstName() {...} public synchronized void setFirstName(String firstName) {...} public String getLastName() {...} public synchronized void setLastName(String lastName) {...} @OneToOne() public Address getAddress() {...} public synchronized void setAddress(Address address) {...} }