Spongevanilla not run in java 9

version spongevanilla-1.12.2-7.1.0-BETA-18
java version 9.0.4

Exception in thread “main” java.lang.RuntimeException: We have detected that you are JRE version 9.0.4, which is out of date!

We don’t yet support Java 9, Modded minecraft in general can’t yet support Java 9.

People are working on it.

Use java 8.