JRockit is a High performance JVM built into Oracle Fusion Middleware.
JRockit, a proprietary Java Virtual Machine (JVM) originally developed by Appeal Virtual Machines and acquired by BEA Systems in 2002,[1] became part of Oracle Fusion Middleware in 2008.
The JRockit code base and the HotSpot virtual machine from Sun Microsystems (now Oracle) are currently being integrated, with the target of releasing a JVM with a combined code base around the release date of JDK 8.