Sun Java System Web Server 6.1 supports Java 2 Platform, Standard Edition (J2SETM) 1.4. The J2SE software is packaged with the Web Server and installed during installation for the Solaris, Linux, and Windows platforms. For the HP-UX and AIX platforms, download the Java Development Kit (JDKTM) from the respective platform vendors' web sites before installing the web server.
The 64-bit Solaris SPARC release of Sun Java System Web Server requires a 64-bit JDK. On all other platforms, a 32-bit JDK is required.