java version "1.6.0_24": as user running Netbeans
java version "1.5.0_28": as su running maven mvn
Maven version: 2.0.8
Firstly, I followed the instructions to build the points example from Maven, but on opening it in Netbeans 6.9.1 I got an error in Points.java and other files:
Annotations not supported in -source1.3 (use -source 5 or higher ..)
Generics not supported in -source1.3 (use -source 5 or higher ..)
(Note that the version of Java I ran Maven as is different from that I ran Netbeans to load the built points project, but I can't see that this could explain the error)
I could not figure out how to fix this in the points project in Netbeans, I did not find a setting for the Java version there, so I created a fresh basic Java Application in Netbeans and copied the points package over into it, and added the objectdb.jar library and it compiled and ran.
The matter is a bit academic now, and I have not solved it in the points project as built from maven, however I thought to share it here in case others encounter the same problem.