What characteristics of Java allow it to build much faster than a comparable C++ program? [duplicate]

Question

Possible Duplicate:
Why does C++ compilation take so long?

I am working with two different projects of about the same size (loc). The Java build process using Ant is measured in minutes. The C++ build processing using the CMAKE tools is measured in hours.

What characteristics of Java allow it to build much faster than a comparable C++ program?

Answer 1

I have to suspect that the absence of kilolines of header files is a lot to do with it.

Answer 2

Templates are especially slow to compile.