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Getting A Directory Or File Size

Jonathan Fleming
Greenhorn

Joined: Jul 18, 2003
Posts: 2
How to you get a directory or file size into an instance variable?
Thanks
Jonathan :^)
Stan James
(instanceof Sidekick)
Ranch Hand

Joined: Jan 29, 2003
Posts: 8791
Look at the java.io.File class. You can create an instance with a filename arg and then check the length. I don't know what it will do for a directory.


A good question is never answered. It is not a bolt to be tightened into place but a seed to be planted and to bear more seed toward the hope of greening the landscape of the idea. John Ciardi
Dirk Schreckmann
Sheriff

Joined: Dec 10, 2001
Posts: 7023
On my Windows XP machine, the length of a directory is 0.
To get the total size of all files in a directory, take a look at that File.listFiles() method.


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Stan James
(instanceof Sidekick)
Ranch Hand

Joined: Jan 29, 2003
Posts: 8791
Rats, you may have to use recursion to the ends of the tree to get the size of all files in a directory. I do this in REXX and make a CSV with these columns:
directory
#files in this directory
#bytes in those files
#files in this plus all subdirectories
#bytes in those files
It's an interesting way to explore disk usage. There are a number of fascinating ways to graph this kinda thing. There is much fun to be had if you want to follow it up.
 
Consider Paul's rocket mass heater.
 
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