Get folder size

Question

Do you know how can I get the folder size in Java?

The length() method in the File class only works for files, using that method I always get a size of 0.

Answer 1

Use apache-commons-io, there's a FileUtils class with a sizeOfDirectory methods

Answer 2

Folders generally have a very small "Size", you can think of them as an index.

All the programs that return a "Size" for a folder actually iterate and add up the size of the files.