Walk, match, clean up

1. static List<String> findLogs(Path root) — walk the tree depth 3, collect the FILE NAMES (not full paths) of every regular file ending in .log, SORTED alphabetically. Use try-with-resources on the stream. 2. static long totalBytes(Path root) — sum file sizes of regular files at ANY depth (Files.size; skip directories). 3. static boolean globMatches(String pattern, Path candidate) — use FileSystems.getDefault().getPathMatcher("glob:" + pattern) and matcher.matches(candidate).

Difficulty: advanced