How to retrieve a list of directories QUICKLY in Java?

Question

Suppose a very simple program that lists out all the subdirectories of a given directory. Sound simple enough? Except the only way to list all subdirectories in Java is to u

Answer 1

if your OS is 'stable' give a try to JNA:

• opendir/readdir on UNIX
• FindFirstFile and related API on Windows
• Java7 with NIO2

these are all "streaming API". They doesn't force you to allocate a 150k list/array before start searching. IMHO this is a great advantage in your scenario.