@Entity
@Table( name = "T_CLIENT_CLI")
public class Client implements Serializable
{
  private static final long serialVersionUID = 1L;
  
  @Id
  @GeneratedValue
  @Column( name = "CLI_ID" )
  private Long id;
  
  @Column( name = "CLI_NOM" )
  private String nom;
  
  @Column( name = "CLI_PRENOM" )
  private String prenom;
  
  @OneToOne
  private Adresse adresse;

geter/seter etc...