Please help...
I'm new to this topic.

What is the best (are the good) SMS Java APIs available?
(A SMS Java API that is comprehensive and/or easy to understand/integrate.) Is the SMSlib / smslib.org ok to use?
(I'm trying to make a very simple program/connection between my pc/Windows XP to my phone Nokia 6500c)

thanks in advance.

I'm not sure about the 3rd party SMS lib but here is a link to the J2ME API documentation. You might want to see if something is available there?

http://java.sun.com/javame/reference/apis.jsp