I'm considering using Drools to create and manage business rules in my application. The documentation (https://docs.drools.org/8.32.0.Final/drools-docs/docs-website/drools/getting-started/index.html) mentions JDK 11 as a prerequisite. My application is Spring Boot 2.x that uses Java 8. Upgrading my application to Java 11 is not an option. Is Drools 8.x compatible with Java 8? If not is there a matrix of Drools and Java version?.

CodePudding user response：

Technically the JDK and the JRE are two different components, but any reasonable distribution of JDK 11 would be built with Java 11's class version, so JRE 8 won't be able to use it.

EDIT:
Actually, Drools 8.x JARs are compiled with Java 11 too, so using Java 8 would be a no-go right off the bat.

CodePudding user response：

Correct, for Drools 8, Java 11 is min version required.

We noted that as well in the release notes too:

JDK 11 is now the minimum Java version required to compile Drools and [JRE 11 to] make use of Drools.

As well as other prerequisite updates.