Sun Java System Web Server 6.1 supports Java 2 Platform, Standard Edition (J2SE) 1.6, and has been certified with the following JDK versions:
Solaris (SPARC, x86, and AMD64): 1.6.0_07
Linux: 1.6.0_07
Windows: 1.6.0_07
HP-UX: 1.6.0.01–jinteg_06_jun_2008_13_24–b00
AIX: 1.6.0 pap3260sr1–20080416_01(SR1)