Java Examples - Display directories in a directory

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Problem Description:

How to display all the directories in a directory?

Solution:

Following example shows how to display all the directories contained in a directory making a filter which list method of File class.

import java.io.*;

class Main {
   public static void main(String[] args) {
      File dir = new File("F:");
      File[] files = dir.listFiles();
      FileFilter fileFilter = new FileFilter() {
         public boolean accept(File file) {
            return file.isDirectory();
         }
      };
      files = dir.listFiles(fileFilter);
      System.out.println(files.length);
      if (files.length == 0) {
         System.out.println("Either dir does not exist
         or is not a directory");
      }
      else {
         for (int i=0; i< files.length; i++) {
            File filename = files[i];
            System.out.println(filename.toString());
         }
      }
   }
}

Result:

The above code sample will produce the following result.

14
F:\C Drive Data Old HDD
F:\Desktop1
F:\harsh
F:\hharsh final
F:\hhhh
F:\mov
F:\msdownld.tmp
F:\New Folder
F:\ravi
F:\ravi3
F:\RECYCLER
F:\System Volume Information
F:\temp
F:\work


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