The Oracle (formerly Sun) Java Platform, Standard Edition (Java SE or JSE) allows you to develop and deploy Java applications on desktops and servers as well embedded and real-time environments. The Java Development Kit (JDK) contains the essential compiler, tools, runtime libraries, and APIs for developers writing, deploying, and running applets and applications in the Java programming language. The Java Runtime Environment (JRE) contains the runtime libraries and tools for running applets and applications.

Changes:
Serious security vulnerabilities in the browser plug-in were resolved. Due to the severity of these vulnerabilities and the reported exploitation of CVE-2013-1493 "in the wild", Oracle strongly recommends the application of this update as soon as possible

URL:
Oracle Java Platform, Standard Edition