Oliver does it again with a great post on how to securely map Java 8 to Java 6 without installing the deprecated Java 6 from Apple.
JDK instructionshttps://oliverdowling.com.au/2015/10/09/oracles-jdk-8-on-mac-os-x-el-capitan/
JRE instructions
https://oliverdowling.com.au/2015/10/09/oracles-jre-8-on-mac-os-x-el-capitan/