Check with this switch : $ java -version java version "1.6.0_16" Java(TM) SE Runtime Environment (build 1.6.0_16-b01) Java HotSpot(TM) Client VM (build 14.2-b01, mixed mode, sharing)
I don't know right now if it's installed by default, but it's in repository for sure http://pkg.opensolaris.org/dev/info/0/pkg%3A%2F%2Fopensolaris.org%2FSUNWjre-config-plugin%400.5.11%2C5.11-0.130%3A20091219T012231Z -- This message posted from opensolaris.org