How to use Files.walk()… to get a graph of files based on conditions?

Question

I have the following directory structures:

/path/to/stuff/org/foo/bar/
/path/to/stuff/org/foo/bar/1.2.3/
/path/to/stuff/org/foo/bar/1.2.3/myfile.ext
/path/to/stu         


        

Answer 1

Files.walk(Paths.get("/path/to/stuff/"))
     .filter(p -> p.toString().endsWith(".ext"))
     .map(p -> p.getParent().getParent())
     .distinct()
     .forEach(System.out::println);

This filters all files that have the extension and gets the parent path of their directory. distinct ensures that every path is used only once.