Welcome to the OpenJDK BSD Port wiki.
Using packages
Some operating systems include packages of the BSD port. Some of them use OpenJDK 7, others use a backport of the BSD port to OpenJDK 6.
OpenJDK 6
FreeBSD
There is an OpenJDK 6 package in the FreeBSD Ports collection called openjdk6.
Darwin/Mac OS X
There is an OpenJDK 6 package in MacPorts called openjdk6. To install it, after installing MacPorts, use sudo port install openjdk6 in the Terminal application.
OpenJDK 7
NetBSD
There is an OpenJDK 7 package in the NetBSD package collection called openjdk7.
OpenBSD
There is an OpenJDK 7 package in the OpenBSD packages collection called jdk1.7.