How is the unique identification of objects recommended to be implemented when using Hibernate?

In Hibernate, the unique identification of objects is implemented using a primary key, which is usually annotated with @Id in the entity. It is recommended to use identifier generation strategies provided by Hibernate, such as:

• @GeneratedValue(strategy = GenerationType.IDENTITY) — auto-increment in the database.
• GenerationType.SEQUENCE — using sequences (e.g., in PostgreSQL).
• GenerationType.UUID or custom generators for unique UUIDs.

Example:

@Entity
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String name;
    // getters and setters
}

This approach guarantees the uniqueness of identifiers and proper operation with caching and relationships in Hibernate.