The page provides access to feature patches that add Java 8 support to Eclipse 4.3.2 (Kepler SR2, in general). The patches are available for installation only through p2 repositories, you can use the "http links" to get directly, or download the "zipped repo" for those that would prefer a local copy of the repository. Also, the "stand alone" ecj compiler, with Java 8 support, is available for download from this page.

Pleases note: the feature patches are intended only for Kepler SR2. In some cases it may actually install into other versions of Eclipse, but in the process your development environment may be partially downgraded or partially upgraded, with unpredictable results.