I have a familiar problem with java/jdk16 on FreeBSD 8.0-RELEASE-p4 (i386). I use portinstall -P java/jdk16 but he breaking in the hotspot build. I have already installed the java/linux-sun-jdk16 (1.6.0.21) but I need the java/jdk16 too for www/rssowl. Here the last message in the build process:
Maybe anybody idea how you compile and install the www/rssowl with this java/jdk16 error? Maybe exists a method to use the java/linux-sun-jdk16 instead of java/jdk16? Because the java/linux-sun-jdk16 work fine 
Sincerely
Krang
Code:
...
chmod +x test_gamma
gmake[5]: Leaving directory `/usr/ports/java/jdk16/work/control/build/bsd-i586/hotspot/outputdir/bsd_i486_compiler2/profiled'
touch bsd_i486_compiler2/profiled
gmake[4]: Leaving directory `/usr/ports/java/jdk16/work/control/build/bsd-i586/hotspot/outputdir'
cd bsd_i486_compiler2/product && gmake -w
gmake[4]: Entering directory `/usr/ports/java/jdk16/work/control/build/bsd-i586/hotspot/outputdir/bsd_i486_compiler2/product'
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
gmake[4]: *** [../generated/MakeDeps.class] Killed: 9
gmake[4]: *** Deleting file `../generated/MakeDeps.class'
gmake[4]: Leaving directory `/usr/ports/java/jdk16/work/control/build/bsd-i586/hotspot/outputdir/bsd_i486_compiler2/product'
gmake[3]: *** [product] Error 2
gmake[3]: Leaving directory `/usr/ports/java/jdk16/work/control/build/bsd-i586/hotspot/outputdir'
gmake[2]: *** [generic_build2] Error 2
gmake[2]: Leaving directory `/usr/ports/java/jdk16/work/hotspot/make'
gmake[1]: *** [product] Error 2
gmake[1]: Leaving directory `/usr/ports/java/jdk16/work/hotspot/make'
gmake: *** [hotspot-build] Error 2
*** Error code 2
Stop in /usr/ports/java/jdk16.
*** Error code 1
Stop in /usr/ports/java/jdk16.
** Command failed [exit code 1]: /usr/bin/script -qa /tmp/portinstall20100906-5585-exmaf7-0 env make
** Fix the problem and try again.
** Listing the failed packages (-:ignored / *:skipped / !:failed)
! java/jdk16 (unknown build error)

Sincerely
Krang