Hello,

I am developing an application using Hibernate and Annotations. This is my code:


@Entity
@Table(name="activity")
Public class Activity {
@ManyToMany
@JoinColum(name="id_group")
private Group group;
}

@Entity
@Table(name="group")
Public class Group {
@ID
@GeneratedValue
@Column(name="id_group")
private Integer ID;

@OneToMany(mappedByd="group")
private Set<Activity> activities;
}


When I try tu run my application I have this exception:

Exception in thread "main" org.hibernate.AnnotationException: mappedBy reference an unknown target entity property: web.Activity.ID in web.Group.activities


Please I need help with this. I'd be grateful for any response