What is the Java Version for building source code?

[Lasantha Ranaweera]

Hi,

What is the recommended Java version to be used with building G from 
source code?

At the moment I am having a problem of building G from source code 
(maven build fails with complaining incompatible Java version). 
Following is my JDK information.

java version "1.5.0_07"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_07-b03)
Java HotSpot(TM) Server VM (build 1.5.0_07-b03, mixed mode)

Anyway I managed to build the source code after commenting out  one line 
in the pom.xml :-) .

Thanks,
Lasantha