Sun Java System Web Server supports Java 2 Platform, Standard Edition (J2SETM) 1.4. J2SE software is bundled with the Web Server and installed during installation. You can also install your own JDK at a later time, following installation of the Web Server. Sun Java System Web Server 6.1 includes JDK 1.4.1 for HP-UX and JDK 1.4.2 for other platforms.
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.