I have an application written in Java. In is stored in several files. It uses different classes with different methods. The code is big and complicated. I think it would be easier to understand the code if I have a graphical model of the code (some kind of directed graph). Are there some standard methods for visualization of code. I am thinking about usage of UML (not sure it is a correct choice). Can anybody recommend me something?
ADDED:
I consider two possibilities:
- Creating the graph by hands (explicitly).
- Creating graph in an automatic way. For example to use some tools that read the available code and generate some graph describing the structure of the code.
ADDED 2:
It would be nice to have something for free.