@Entity
@Table(name="Reservation")
public class Reservation {
   @Id
   @GeneratedValue(strategy=GenerationType.AUTO)
   @Column(name="numReservation")
   private Integer numChambre;
   
   @Column(name="debutReservation")
   @Temporal(TemporalType.DATE)
   private Calendar debutReservation;
   
   
   @Column(name="finReservation")
   @Temporal(TemporalType.DATE)
   private Calendar finReservation;
   
   @Column(name="dateReservation")
   @Temporal(TemporalType.DATE)
   private Calendar datereservation;
   
   
   @Column(name="prix")
   private Double prix;
   
   
   @Column(name="libelleReservation")
   private String libelleReservation;
   
   
   //@OneToMany(mappedBy="Reservation")
   //private List<Client> ClientList;

}

@Entity
@Table(name="Client")
public class Client {
   @Id
   @GeneratedValue(strategy=GenerationType.AUTO)
   @Column(name="numClient")
   private Integer numClient;
   
   @Column(name="nameClient")
   private String nameClient;
   
   @Column(name="adressClient")
   private String adressClient;
   
   @Column(name="phoneClient")
   private String phoneclient;
   
   public Integer getNumClient() {
      return numClient;
   }