@EntityGraph(value = "User.withAddress")
User findById(Long id);

@EntityGraph(type = EntityGraphType.LOAD)
User findById(Long id);

@EntityGraph(attributePaths = {"address", "orders"})
User findById(Long id);

@Entity
@NamedEntityGraph(name = "User.withAddress", attributeNodes = @NamedAttributeNode("address"))
public class User {
    // Поля и методы
}

@EntityGraph(attributePaths = {"address", "orders"})
User findById(Long id);

@EntityGraph(attributePaths = {"address"})
@Query("SELECT u FROM User u WHERE u.email = :email")
User findByEmail(@Param("email") String email);

@Lock(LockModeType.PESSIMISTIC_WRITE)
User findById(Long id);

@Lock(LockModeType.PESSIMISTIC_WRITE)
User findById(Long id);

@Lock(LockModeType.OPTIMISTIC)
User findById(Long id);

@Lock(LockModeType.PESSIMISTIC_WRITE)
@Query("SELECT u FROM User u WHERE u.email = :email")
User findByEmail(@Param("email") String email);

@Transactional
@Lock(LockModeType.PESSIMISTIC_WRITE)
User findById(Long id);

import java.util.Optional;

public class Task270325 {
    public static void main(String[] args) {
        Optional<String> optional = Optional.ofNullable(null);
        System.out.println(optional.orElse("Default"));
    }
}

@Procedure("calculate_discount")
BigDecimal calculateDiscount(@Param("orderId") Long orderId);

@Procedure(procedureName = "calculate_discount")
BigDecimal calculateDiscount(@Param("orderId") Long orderId);

@Procedure(outputParameterName = "discount")
BigDecimal calculateDiscount(@Param("orderId") Long orderId);

@Entity
@NamedStoredProcedureQuery(
    name = "calculate_discount",
    procedureName = "calculate_discount",
    parameters = {
        @StoredProcedureParameter(mode = ParameterMode.IN, name = "orderId", type = Long.class),
        @StoredProcedureParameter(mode = ParameterMode.OUT, name = "discount", type = BigDecimal.class)
    }
)
public class Order {
    // Поля и методы
}

@Procedure(outputParameterName = "discount")
BigDecimal calculateDiscount(@Param("orderId") Long orderId);

@Procedure
@Query(value = "CALL calculate_discount(:orderId, :discount)", nativeQuery = true)
BigDecimal calculateDiscount(@Param("orderId") Long orderId, @Param("discount") BigDecimal discount);

@Transactional
@Procedure("calculate_discount")
BigDecimal calculateDiscount(@Param("orderId") Long orderId);

@IdClass(UserId.class)
public class User {
    @Id
    private Long departmentId;

    @Id
    private Long userId;

    // Остальные поля и методы
}

public class UserId implements Serializable {
    private Long departmentId;
    private Long userId;

    // Конструктор по умолчанию
    public UserId() {}

    // Конструктор с параметрами
    public UserId(Long departmentId, Long userId) {
        this.departmentId = departmentId;
        this.userId = userId;
    }

    // Геттеры и сеттеры

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        UserId userId1 = (UserId) o;
        return Objects.equals(departmentId, userId1.departmentId) &&
               Objects.equals(userId, userId1.userId);
    }

    @Override
    public int hashCode() {
        return Objects.hash(departmentId, userId);
    }
}

@Embeddable
public class UserId implements Serializable {
    private Long departmentId;
    private Long userId;

    // Конструктор по умолчанию, геттеры, сеттеры, equals, hashCode
}

@Entity
public class User {
    @EmbeddedId
    private UserId id;

    // Остальные поля и методы
}

public interface UserRepository extends JpaRepository<User, UserId> {
    // Методы репозитория
}

public class Task280325 {
    public static void main(String[] args) {
        int x = 10;
        int y = 20;
        
        if(x == 10)
            if(y == 10)
                System.out.println("A");
            else
                System.out.println("B");
        
        System.out.println("C");
    }
}

@MapsId("userId")
@OneToOne
@JoinColumn(name = "user_id")
private User user;

@Entity
public class UserProfile {
    @Id
    private Long userId;

    @MapsId
    @OneToOne
    @JoinColumn(name = "user_id")
    private User user;

    // Остальные поля и методы
}

@Entity
public class Order {
    @Id
    private Long orderId;

    @MapsId("userId")
    @ManyToOne
    @JoinColumn(name = "user_id")
    private User user;

    // Остальные поля и методы
}

@Entity
public class UserProfile {
    @EmbeddedId
    private UserProfileId id;

    @MapsId("userId")
    @ManyToOne
    @JoinColumns({
        @JoinColumn(name = "department_id", referencedColumnName = "departmentId"),
        @JoinColumn(name = "user_id", referencedColumnName = "userId")
    })
    private User user;

    // Остальные поля и методы
}

public interface UserProfileRepository extends JpaRepository<UserProfile, Long> {
    // Методы репозитория
}