emerge -u system error ??

[trinladen]

I tried to emerge -u system and it keeps bombing at the same spot. I dont know why exactly. Maybe someone here can give me a hint?

ecking for javac... no
checking for gcj... gcj -C
checking if gcj -C works... yes
checking for jar... no
configure: error: no acceptable jar program found in $PATH

!!! ERROR: sys-libs/db-4.0.14-r2 failed.
!!! Function src_compile, Line 73, Exitcode 1
!!! (no error message)

bash-2.05b# emerge -p sys-libs/db-4.0.14-r2

just cant get by this dev app. I would like to update but cant figure how to get around this

THanks
Trin