Person.java

@Entity
public class Person {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    
    @NotEmpty
    @Size(min = 5)
    private String fullName;
    
    @NotEmpty
    @Email
    private String email;

    @NotNull
    @Min(value = 18)
    private Integer age;
    
    // Getters and Setters
}