1. Java
Javasoft: http://www.javasoft.com
Sun: www.sun.com
Developer.com: http://java.developer.com
Tutorial: http://java.sun.com/docs/books/tutorial
Java Standard Library: http://download.oracle.com/javase/7/docs/api/
2. C/C++
Detialed for C/C++ library with sample code: MSDN
Detialed for C++ library with sample code: www.cplusplus.com
compiler intrinsics (many useful function for access the local machine's info, such as
__cpuid): http://msdn.microsoft.com/en-us/library/26td21ds(v=VS.80).aspx