[justinsb]

Presumably you just want to replace the _Oracle_ JVM? Does OpenJDK meet your needs? How about Dalvik / ART or RoboVM?

I'd love to hear what you're trying to achieve here ... I have often bemoaned the JVM, but have also found that it's often better than many alternatives.

[threeseed]

There is a whole range of JVMs: http://en.wikipedia.org/wiki/List_of_Java_virtual_machines

[alrs]

Whenever you get in trouble with Elasticsearch, the first question a consultant will ask is, "why aren't you running the Oracle JVM?"

Technically it supports OpenJDK. In practice, circumstance usually drags you to Oracle.