Reading in files from a folder

Question

Hiya, i have a folder of .txt files i want to read in, i can read it single txt files when i specify the name of it, but i want to be able to automatically read ALL text files within a folder, so read one in, perform some processing on it, then move to the next one, till all present folders have passed through. is this possible?
thanks
dori

Answer 1

Try this. This is probably what you want:
import java.util.*;
import java.io.*;
public class Test
  public static void main (String args []) throws Exception
     File dir = new File ("c:\");
     readFiles (dir);
  public static void readFiles (File file)
     if (file.isDirectory ())
          String [] exts = {".txt"};
          FileNameFilter fileNameFilter = new FileNameFilter (exts);
          File [] children = file.listFiles (fileNameFilter);
          for (int i=0;i < children.length;i++)
               readFiles (children );
     else
          // Process the file here
          System.out.println ("Processing File : " + file.getPath ());
     static class FileNameFilter implements FilenameFilter
          private String [] extensions = null;
          public FileNameFilter (String [] exts)
               extensions = exts;
          public boolean accept (File dir, String name)
               File tmpFile = new File (dir.getPath () + "/" + name);
               if (tmpFile.isDirectory ()) return true;
               if (extensions == null) return false;
               name = name.toLowerCase ();
               for (int i=0;i < extensions.length;i++)
                    if (name.endsWith (extensions [i])) return true;
                    //if (name.endsWith (".jpg")) return true;
               return false;