How to compile a MXML file to AS3

I want to compile one class from MXML to as3 as a learning experience. What is the best way to do this?

The class had dependencies on other classes in my project but I don't think that should matter if I am just compiling it to as3 right?

What is the easiest way to do this? Currently I have Flash Builder 4 (in Eclipse) but I would be happy just to use a command line compiler开发者_JAVA技巧 if that exists.

I was sure that this question must have been asked before but I could not find it. If it has already been asked please close this and point me towards the older question/

See keep-generated-actionscript command line option here.

You can use it both in command line and from Flash Builder.