JDK 1.6.0 Update 14 and the new G1 garbage collector

I installed the update 14 of JDK 1.6.0.
This update has a new Garbage Collector called G1.

To try this new feature in netbeans I switched the options in etc/netbeans.conf on, but didn't find the options to set.

Here are the options( search for G1):

The production use of G1 is only permitted with a Java Support Contract!!!