Re: listing dirs in current webapp...

From:
maya <maya778899@yahoo.com>
Newsgroups:
comp.lang.java.help
Date:
Mon, 25 Feb 2008 15:20:04 -0500
Message-ID:
<fpv7tl$ei1$1@aioe.org>
Nigel Wade wrote:

maya wrote:

hi, I'm trying to detect subdirectories in current webapp, not sure how
to filter dirs from files that are not dirs.. found something here,
http://www.exampledepot.com/egs/java.io/GetFiles.html?l=rel

  File dir = new File("directoryName");

     String[] children = dir.list();
     if (children == null) {
         // Either dir does not exist or is not a directory
     } else {
         for (int i=0; i<children.length; i++) {
             // Get filename of file or directory
             String filename = children[i];
         }
     }

but it how do you tell it to filter dirs ONLY?????
   (once we do String[] children = dir.list(); we can't test for
isDirectory() anymore, since isDirectory() method cannot be applied to
strings..)

am simply trying to detect which files in current dir (i.e., current
webapp) are directories..

thank you...


Well, you could use the File(String) constructor and create a new File and
invoke the File.isDirectory() method on that. Or you could read the Javadocs
for File and find that it has a method listFiles() which returns a File[]
rather than a String[] ;-)

     File[] children = dir.listFiles();
     if (children == null) {
          // Either dir does not exist or is not a directory
     } else {
        for (File child:children) {
          if ( child.isDirectory() ) {
            // process the directory
          }
        }
     }


yes, that was it.. thank you very much...
   (have never seen this construction..

    for (File child:children) {

couldn't use it in the end b/c needed standard 'i' var that's
declared/init'd in loops.. but curious anyway..

thank you..

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