File Heros = new File (getDocumentBase ().toString () + "Heros/");
HeroName = Heros.list ();
[java] Getting a list of files in a folder
Author
I have been unsuccessful on getting a list of file from a folder. At this point I have been using...
but this doesn't work because all the slots in the HeroName array are null. Does anyone know how to do this?
Jake
try looking at this link:
http://javaalmanac.com/egs/java.io/GetFiles.html
it has a code example of how to list the files and subfolders in the current directoy.
http://javaalmanac.com/egs/java.io/GetFiles.html
it has a code example of how to list the files and subfolders in the current directoy.
it amazes me the number of people that don't read the API documentation
java.io.File.
the bold portion is your problem
here's how to do it.
java.io.File.
Quote:
list
public String[] list()Returns an array of strings naming the files and directories in the directory denoted by this abstract pathname.
If this abstract pathname does not denote a directory, then this method returns null. Otherwise an array of strings is returned, one for each file or directory in the directory. Names denoting the directory itself and the directory's parent directory are not included in the result. Each string is a file name rather than a complete path.
There is no guarantee that the name strings in the resulting array will appear in any specific order; they are not, in particular, guaranteed to appear in alphabetical order.
Returns:
An array of strings naming the files and directories in the directory denoted by this abstract pathname. The array will be empty if the directory is empty. Returns null if this abstract pathname does not denote a directory, or if an I/O error occurs.
Throws:
SecurityException - If a security manager exists and its SecurityManager.checkRead(java.lang.String) method denies read access to the directory
the bold portion is your problem
here's how to do it.
try{ File f = new File ("mypathstring"); File[] files; if(f.isDirectory()){ files = f.listFiles(); //There is an optional FileFilter parameter to list files that meet a certain criteria //do some stuff to the files }}catch(NullPointerException e){ //if the pathname argument is null}Quote:it amazes me the number of people that don't read the API documentation
Yes, a sad reality on these forums. =/
Jake, don't forget to implement your own FileFilter classes if you wish to filter the files returned by the listFiles() method.
Son Of Cain
Quote:File Heros = new File (getDocumentBase ().toString () + "Heros/");
Java coding conventions specify that variable names are camelCase.
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