Is programming against interfaces in Java the same concept as using header files in C/C++?

Question

The java code I\'m working on at the moment has often a structure like

file Controller.java:

interface Controller {...}

file Controller

Answer 1

No. In C++, files (headers) are not the same as classes.

Programming against interfaces as in Java can be done in C++, too, by programming against abstract base classes.

However, the Java term of "interface" is quite restricted. Basically, any function declaration is an interface:

void call_me(int times); 

As are, of course, classes and other types.

In C++, you group such things in headers, so an interface can consist of one header. However, it might just as well consist of multiple headers.