Java 8 support for jazz

In theory, you would set the runtime to be used in the Eclipse PDE. In general, the suggestion is to use the JDK that comes with the solution, instead of another JDK. So, you could probably do that, but there is good chance that it won't run with a different version. There have been problems with using the Sun JDK instead ofthe IBM JDK that ships with the product. You have to run the extensions with the same version you run the server on, so you would have to run the server on Java 8 as well, which might not work.