Why isn't JRE showing up on Preference "advanced" page?

I have the latest version of LibO (5.1.2002), and after updating it said my Java Runtime was in need of an update. I loaded the latest JRE version (1.8.0_77), but it is not showing up in the preferences file at all. I do have the path to the plug-in, but LibO will not accept it. Should this be of concern?

Java version 1.8.0_77 apparently is a JDK version. This is what Oracle says,
Java 8 Update 77 (8u77)
Release Highlights
JDK 8u77 contains IANA time zone data version 2016a. For more information, refer to Timezone Data Versions in the JRE Software.
Java Expiration Date
The expiration date for 8u77 is 4/19/16. For systems unable to reach the Oracle Servers, a secondary mechanism expires this JRE (v 8u77) on May 19, 2016.

Since v5.x a JDK (rather than JRE) is required.