Java APIs

Use the one from Sun, it works just fine.

is that supposed to b a joke of some kind?

anyway, i need to convert a java app to a windows service... not just launch it as a service using instsrv.exe and srvany.exe, but convert the whole set of classes to 1 exe file, that can b started as service... got anyway to do it?

You don't exactly the need the Microsoft SDK for Java for that. There is a product called NativeJ that basically creates a C/C++ application to invoke the VM which then loads and executes your classes. The Professional edition of this product has the option to configure it as a Windows service. Unless you're too picky about converting all of your class files into one executable package, check out the product at:
http://www.dobysoft.com/products/nativej/

Microsoft products always sucks. Don't use it. :p

You can say that again
lol
but what about the visual J#?
it's a java sdk from Micro$oft (I think) is it any good?

I have no experience at all programming with J#, but using it will limit portability and constrict you to platforms that Microsoft supports (Windows). Even on the Microsoft Visual J#'s website, it clearly states that programs written with it will not work on any Java Virtual Machine. Hence, J# is NOT an SDK for Java, it's not Java in the first place.

Visual J++ is set up to use the microsoft SDK instead of SUN's. It's a good compiler too.

AFAIK:

There is no MS SDK for Java: MS violated their Java license agreements and no longer have rights to it.

MS do have products named J++, C# etc. You may want to investigate that.