is field or property based annotation same

[Samanthi perera]

I read there are 2 ways to use annotatin in EJB 3.
field based anotation which we annotate instance variables.
Property based annotation is annotate getters.
Anyway my prblem is that getters returns the values of instance variables.
then why we use 2 ways?

[Jaikiran Pai]

There's a good explanation about it here