Java Advanced Imaging
Java Advanced Imaging is a Java platform API which allows developers to create their own image manipulation routines.
JAI is provided as a free download directly from Oracle Corporation for the Windows, Solaris, and Linux platforms. Apple Inc. provides an OS X version of the API from their website for Mac OS X v10.3. JAI ships with Mac OS X v10.4 and later.
While the API is provided in Java, platform-specific implementations can either use the pure Java implementation or provide an implementation that takes advantage of native technology on the platform to provide better performance.