As every one know java is one of the most powerfull programming tools in this world, java application can be run on many platform (create once run every where). Every java aplication need JVM (Java Virtual Machine), without JVM java aplication cannot be run.
Oracle build with java technology in all core. This why oracle can be installed in other Operating System. As Java aplication Oracle need a virtual machine, but now Oracle have they own Virtual machine and they have name 
We must be wondering what is the different JVM with JRockit?
As we know JVM (SUN Microsystem) have a high memory used, Oracle try to break this with JRockit problem as the first JVM uniquely optimized for the Intel platform, enabling Java applications to run with increased reliability and performance on lower cost, standard-based platforms. Unlike other JVMs, BEA JRockit is designed to power demanding server-side Java
applications-delivering superior performance, manageability, and reliability for enterprise applications.
