this implies that I can use and scripts, I can NOT use directly in CF, but through these languages (indirectly)?

ColdFusion is essentially a declarative system which takes HTML (XML) text containing ColdFusion tags and on-the-fly compiles it into Java, which is then executed.

The design of ColdFusion is such that it "very cleverly takes care of" most of the scenarios that commonly arise in web applications ... especially the myriad applications that you find in a typical company intra-net.  (But, on the server-side, it also provides a very well thought out, highly scalable implementation that can handle a lot of load quite gracefully.)

You'll find that most of the things that require "scripting" in other languages can be done in ColdFusion with little-or-no scripting at all.  ("That is," after all, "the point." )  Take full advantage of what ColdFusion offers you.  This is a system that's well-designed to take advantage of the "80/20 rule."  It's well designed to allow you to be "lazy," so if you find yourself doing a bunch of work, "hmmmmmmm, maybe there's an easier way ..."

If you need to do more specialized scripting, yes, ColdFusion does run in a Java environment and you can branch-out into full Java within your code.  Also, you can interface with dot-NET assemblies.  But, before you "up and just go doin' that," stop and carefully consider all of your alternatives.  "When in Rome, do as the Romans do."  Take full advantage of what ColdFusion offers you ...  "Laziness is a virtue."

Please take a moment to read

http://catb.org/esr/faqs/smart-questions.html#writewell it will help

you get better answers.

Mack