See this link:
http://openbsd.org/faq/faq8.html#Programming

On 5/16/08, John Nietzsche <john.nietzsche@gmail.com> wrote:
quoted text
> Dear users,
>
> i would like to add support for java on my 4.3 openbsd desktop. Has
> anybody already done so? May you point a url where i could download
> the package(s) from?
>
> Thanks in advance.