you're trying to get data from your swf and save it where?
In a text file for example.
But main problem is to get it, being able to automatically handle it in a c or java program
if you are just trying to extract data from a swf, you would need to know where in the swf the relevant info is - you could use a swf decompiler to analyse the swf file and find where in the file the data is stored. then you could load the file and extract the relevant bytes
assuming that the flash animation is getting its info from somewhere else, cant you just bypass the swf and get the data from the same place?
if you're trying to extract data from a website that's not under your control (especially if that's publically available info like weather data), you should look for a website that has an rss feed designed for public use.