Here is where you can download the latest Slackware packages for openjdk7 and openjre7 (Slackware 14.1 and newer):
… and openjdk and openjre version 8 (Slackware 14.1 and newer):
Rsync access via rsync://slackware.nl/mirrors/people/alien/slackbuilds/
Note about usage:
My Java 7 and Java 8 packages (e.g. openjdk7 and openjdk… or openjre7 and openjre) can not co-exist on your computer because they use the same installation directory. You must install either Java 7 or Java 8.
Remember that I release packages for the JRE (runtime environment) and the JDK (development kit) simultaneously, but you only need to install one of the two. The JRE is sufficient if you only want to run Java programs (including Java web plugins). Only in case where you’d want to develop Java programs and need a Java compiler, you are in need of the JDK package.