Count files in Directory and the number of files in each sub directory

Question

Hello,
I trying write a method which will start at a root of a file and count all the files in that directory. Then count all the files in each sub directory.
import java.io.File;
import java.io.FilenameFilter;
import java.io.IOException;
public class RunScan {
     * @param args
     public static void main(String[] args) {
          // TODO Auto-generated method stub
          File file = new File("/home/robert/count");
          File[] files = file.listFiles();
          traverse(files);
          printfiles();
     private static int totalNumFiles = 0;
     private static int totalNumDir = 0;
     private static int filePerDir = 0;
     private static int subDir = 0;
     private static void traverse(File[] files) {
for(int i = 0; i < files.length; i++) {
if(files.isDirectory()) {
     totalNumDir++;
     printDir(files[i].toString());
     traverse(files[i].listFiles());
totalNumFiles++;
filePerDir++;
     private static void printfiles(){
          System.out.println("total files "+ (totalNumFiles));
     System.out.println("totls sub dir "+ totalNumDir);
     private static void printDir(String dirName){
          System.out.println("Total Files in "+dirName+" "+filePerDir);
          filePerDir = 0;

Answer 1

Hint: Google "visitor pattern." This gives clues how to build a re-usable solution that can you use for future traversals that do things other than just file counts. Here's a teaser of an simple interface:
public interface TreeVisitor {
* Processes a single file or directory. <em>Tip:</em> If you want to track the number of
* items processed, this function is the best place to update a counter.
* Implementors of this method should not throw checked exceptions.
* @param item The file or directory process.
* @param depth Number of levels below top of traversal tree (0 = top of tree).
public void visit(File item, int depth);
}