当前不是.

从这个 GitHub问题看来，它很快就会准备就绪于2019年2月发布.但是，Java 11 确实包括对Graal编译器的支持，可以通过以下标志启用该功能:

From this GitHub issue, it seems that it will be ready around the end of February, 2019. However, Java 11 does include support for the Graal compiler, which can be enabled with the following flags:

-XX:+UnlockExperimentalVMOptions -XX:+UseJVMCICompiler

根据该GitHub问题，看来Graal 19.3将于2019年11月19日发布，其中应包括Java 11支持.

According to that GitHub issue, it looks like Graal 19.3 will be released on November 19, 2019, which should include Java 11 support.