The IBM® SDK is a development environment for writing and running applets and applications that conform to the Java™ 6 Core Application Program Interface (API). Version compatibility In general, any applet or application that ran with a previous version of the SDK should run correctly with the IBM 32-bit SDK for AIX, V6. Classes that are compiled with this release are not guaranteed to work on previous releases. Migrating from other IBM JVMs From Version 5.0, the IBM Runtime Environment for AIX contains new versions of the IBM Virtual Machine for Java and the Just-In-Time (JIT) compiler. Supported environments The IBM 32-bit SDK for AIX, V6 is supported on certain hardware platforms and operating systems, and is tested on specific virtualization environments. Additional information for AIX Important information for IBM 32-bit SDK and Runtime Environment for AIX, Java Technology Edition, Version 6.