First Look at JPA Annotations

In the earlier posts we saw how to run a JPA application. I decided to have a look at the annotations used in the previous examples.

persistence.xml

In previous post we have seen the persistence.xml file - the file provides all the configuration information needed to get JPA up and running. We also saw that the JPA standard is very particular of the location of the file.

Working with the Iterator

Before I start let me state that I am still to come across a valid scenario in actual application code where I could find this functionality useful.

My First JPA Application - 3

In the last two posts we setup the code to run a simple JPA example. In this post I shall now test out the code. The code to execute is as below:

My First JPA Application - 2

In the previous post I created  the project structure for my JPA application. Now to look deeper into the code. I decided to build a simple Pet-Owner relation. One owner can have multiple pets. The java classes for the same is as below: