Hibernate/JPA ManyToOne vs OneToMany

Question

I am reading currently the documentation of Hibernate regarding the entity associations and I come accross a little difficulty to figure out some things. It has to do in ess

Answer 1

While above answers are accurate, I will present the answer in a different way.

Both @OneToMany and @ManyToOne have two parts; left part and right part. For example; @OneToMany = 'One' is left part and 'Many' is right part likewise @ManyToOne = 'Many' is left part and 'One' is right part.

Simple rule of association using this understanding is, left part represents the class that you are defining the association.

So, if you define @ManyToOne in OrderLine class referencing to Order class, it means many OrderLine associated to one Order class.