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

As of 2020, the DirectoryStream does seem to be faster than using File.listFiles() and checking each file with isDirectory().

I learned the answer from here:

https://www.baeldung.com/java-list-directory-files

I'm using Java 1.8 on Windows 10.