how to save data for a mob

[marstone]

I have been reading through alot of stuff on this, but am confused on how to do this.  I need to save an x,y,z, location for a mob, so it will hold through unloading and loading of an area, or server reboot.  So question is, is the variables in the class held over, or do I have to save and reload in some form??  Thanks, mind is alittle mushy right now so alittle help is needed.

[marstone]

thanks, I was thinking that was where I would have to do it, but was not sure how minecraft handled variables as a whole.  Already have those stubbed out, so will finish them out to save the data.  Thanks again.