Thanks Dobromir.

But ctrl+b usually works fine in other cases - compiles just the file
I wont (have turnd off option to compile on save). Is there a way to
do colmipile of just a file with this settings? I like to save may
files in every few secs... just in case ... but don't like to compile
it this often ... I have lots of libraris included, and compiling
after every save is annoying.

If I don't compile it, and go to debug, Eclipse will do the same thing
- it first recompiles all and then start debug. It happends only after
I closed eclipse form task manager, becouse it blocked during debug or
in some other reson.

The problem is, it starts recompiling all clases when I start debug,
altought there is no change made since last time I used debug.