The Java Runtime Environment (JRE) provides the libraries, the Java
Virtual Machine, and other components to run applets and applications
written in the Java programming language. In addition, two key
deployment technologies are part of the JRE: Java Plug-in, which enables
applets to run in popular browsers; and Java Web Start, which deploys
standalone applications over a network. This is the official Java
Download from Sun Microsystems.
Java Runtime Environment is in the Other Browser Add-ons & Plug-ins category of the Browsers section.
What's new in this version: Version 7 Update 4 adds new Java HotSpot Virtual Machine and flag to unlock Commercial Features.