Traverse a directory - see files and folders

Question

I can do this in ASP for our intranet but need to do the same in Java for our extranet.
Before I redirect a person to view a pdf I need to check if that pdf exists (is in the directory). Is there a way to view the files in a directory using Java?

Answer 1

Hi
Here is some sample code you can use the program loops through the supplied path or the current dir if no argument is given. Currently it only prints out the whole dir structure (including files) to the screen. All you'll need to do is test these values.
import java.io.*;
public class FindDir {
     public static void main(String args[]) {
          if (args.length == 0) args = new String[] { ".." }; //start current if no arg supplied
          try {
               File pathName = new File(args[0]); //where to start
               String[] fileNames = pathName.list();
               for (int i = 0; i < fileNames.length; i++) {
                    File tf = new File(pathName.getPath(), fileNames);
                    if (tf.isDirectory()) {
                         System.out.println(tf.getCanonicalPath()); //directories
                         String[] dirFiles = tf.list();
                         for (int j = 0; j < dirFiles.length; j++) {
                              File df = new File(tf.getPath(), dirFiles[j]);
                              if (df.isFile()) {
                                   System.out.println(df.getName()); //files
                         main(new String[] {tf.getPath()});
          catch(IOException e) {
               System.out.println("Error: " + e);