Ok I'll try not to stick my neck deeper to that "Holy war"... I'd just like to point out that even as I get most stuffs done with Perl, not all things can be done that way.
Perl is a very good tool for anybody who can use it, but it's not "the only language".
Eg. I was once in a project that included threading and speed was essential, so it was clear from the beginning that we just could not do it with Perl (Perlthreads, that's another "holy war") so we chose C++.
Personally I don't like Java, but that's just my optinion.