Oracle is committed to a vibrant, participatory community supporting the Java Platform, Standard Edition (Java SE). Oracle will continue to make the Java Development Kit (JDK) and Java Runtime Environment (JRE) freely downloadable as well as continue support for the open-source implementation of Java SE via the OpenJDK project. With the Sun acquisition, Oracle has two major Java Virtual Machine (JVM) implementations, the Java HotSpot VM and the Oracle JRockit JVM. In the short-to-medium term, both will continue as strategic JVMs with active investment. Over time, Oracle plans to converge the functionality and code bases of these JVMs. More Information about Java HotSpot VM is available here.
Oracle JRockit is a comprehensive family of Java SE runtime solutions. The base JRockit JVM is the world's fastest JVM according to industry benchmarks such as SPECjbb2005. JRockit Real Time provides deterministic response times for standard Java on the order of milli- or even micro-seconds, suitable for the latency requirements of the most demanding financial, military, and telecom applications. Customers have experienced significant performance increases—some exceeding 70 percent—and reductions in hardware costs of as much as 50 percent using JRockit products.