they should have used Perl5 and Moose thought!
According to sloccount of latest tar of OpenJDK6:
java: 2393565 (72.63%) cpp: 462235 (14.03%) ansic: 419499 (12.73%) sh: 17089 (0.52%) asm: 1936 (0.06%) awk: 598 (0.02%) lisp: 449 (0.01%) cs: 72 (0.00%) jsp: 24 (0.00%) csh: 3 (0.00%)
There is lisp in there? I am betting elisp for an emacs major mode or something. But 72% Java. c/c++ would be for posix interfaces, and probably enough core VM code, and perhaps hotspot stuff.
they should have used Perl5 and Moose thought!