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The moose likes Architect Certification (SCEA/OCMJEA) and the fly likes JDO & JPA Big Moose Saloon
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Naveen K Sinha

Joined: Mar 16, 2004
Posts: 12

I am confused between these two things.. JDO and JPA. Why two different framework for the same thing ? What level of understanding I need to have on JDO for the exam.

I already have read JPA. Do, I need to study JDO as well ? Or should I just remember the few differences like JPA is only for RDBMS, JDO supports many different databases; JDO more mature than JPA. ( I know only these two :-( )

Appreciate your help.


prathap venkata naga yelugula
Ranch Hand

Joined: Aug 13, 2008
Posts: 251
Hi .
Can you suggest me one good book for JPA.
Riyaz Enayath
Ranch Hand

Joined: Sep 01, 2009
Posts: 33
Hi Pratap,

Below are JPA resources:

(i) EJB 3.0 JPA Specification (JSR 220)

(ii) Part 5 on Java EE 5 Tutorial from Official website (

(iii) Part 7 on ejb-3 in action (Implementing domain models)

Hong Anderson
Ranch Hand

Joined: Jul 05, 2005
Posts: 1936
JDO has more flexibility than JPA. JDO supports any type of datastore whereas JPA is so narrowed and limited to RDBMS only.
JDO 2 also has more features than JPA1.

SCJA 1.0, SCJP 1.4, SCWCD 1.4, SCBCD 1.3, SCJP 5.0, SCEA 5, SCBCD 5; OCUP - Fundamental, Intermediate and Advanced; IBM Certified Solution Designer - OOAD, vUML 2; SpringSource Certified Spring Professional
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subject: JDO & JPA
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