This week's book giveaway is in the Servlets forum.
We're giving away four copies of Murach's Java Servlets and JSP and have Joel Murach on-line!
See this thread for details.
The moose likes Beginning Java and the fly likes ArrayList of filenames Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login

Win a copy of Murach's Java Servlets and JSP this week in the Servlets forum!
JavaRanch » Java Forums » Java » Beginning Java
Bookmark "ArrayList of filenames" Watch "ArrayList of filenames" New topic

ArrayList of filenames

Conrad McLaughlin

Joined: Jan 31, 2006
Posts: 27
Is it possible to an arraylist (string) of the names of files within a directory? eg. textfiles

i'm guessing you would need a while loop. but how to use fileinputreader?
Keith Lynn
Ranch Hand

Joined: Feb 07, 2005
Posts: 2367
In the class there is a method called list() which will return a String array containing all the files and directories within the if it is a directory.
Conrad McLaughlin

Joined: Jan 31, 2006
Posts: 27
Thanks. I'm trying to work with it now.

but i keep getting:

Any tips on how to actually write the code to save filenames in string array?
Conrad McLaughlin

Joined: Jan 31, 2006
Posts: 27
I solved the problem:

Thanks for the help.
Layne Lund
Ranch Hand

Joined: Dec 06, 2001
Posts: 3061
Note that there is also a listFiles() method that returns an array of File objects. I often find that this is much more useful since I typically need File objects to deal with the files rather than just Strings representing their names. Also, it saves the step of creating my own File object for each String.

For more information, you should check out the Java API docs. These are always helpful to figure out the methods in a given class. Of course you have to know where to look, so that's why you should practice navigating them.


Java API Documentation
The Java Tutorial
jQuery in Action, 2nd edition
subject: ArrayList of filenames
Similar Threads
Arraylist Vs LinkedHashMap
readonly ArrayList
Collections.copy method for lists ? how it works
How do you avoid an ArrayList object from being modified, i.e. avoid adding and deleting its content
why some classes are called deprecated & some legacy?