How to extract actionscript classes from a swf file?

when I try to extract .fla and .as from .swf (from Sothink SWF Decompiler), the classes in the file .as are all numbers, like this:

aso#33082.onPress = function ()
{

or

function    ()
{
    for (aso#88375 = 0; aso#88375 &l开发者_JAVA技巧t; 1000; aso#88375++)
    {
        delete eval("_root.map.arrows.arrow" + aso#88375).onEnterFrame;
    }

why there are those numbers? is there any way to extract the classes correctly?

Thank you!

No, this information is lost once the SWF is compiled in release mode.