Listing a special type of files in a subDirectory

Question

hi all,
i have a directory where there are some other subdirectories inside it .
each one of these sub directories contains 2 files: an xml file and a PNG file .
can i obtain a list of all the xml files only in all subdirectories ??
if any body knows please try to reply and show me how can this be done...
thanks in advance.
regards,
D.Roth.

Answer 1

Quick and dirty, and if you only need the file names, you could just use String for your Lists, instead of File references.
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class Test  {
     public static void main(String[] argv) throws IOException
          List<File> javaFiles = new ArrayList<File>();
          File topDir = new File("c:\\Testing");
          if(topDir.isDirectory())
               javaFiles = getFiles(topDir);
          System.out.printf("Found %d xml files is directory %s and its sub-directories",javaFiles.size(), topDir.getName() );
          for(File f : javaFiles)
               System.out.println(f.getPath());
     private static List<File> getFiles(File dir)
          List<File> fileList = new ArrayList<File>();
          File [] files = dir.listFiles();
          for(int i = 0; i < files.length; i++)
               if(files.isDirectory())
                    fileList.addAll(getFiles(files[i]));
               else if(files[i].getName().endsWith(".xml"))
                    fileList.add(files[i]);
          return fileList;
Of course, if you are that new, you might want to back up some and acutally learn java before doing stuff like this. Not that it is that complicated, but you need the basics first. Use this code as is at your own risk.
~Tim