Get a file from the cmd line and walk the file system.

FileWalker

import java.io.*;
import java.util.*;

public class FileWalker {
   public static void main(String[] args) {

   for( int i = 0; i < args.length; i++ ) {
      File f = new File(args[i]);
      if(f.exists()) {
        System.out.println("Name: " + f.getName());
        System.out.println("Absolute path: " + f.getAbsolutePath() );
        try {
           System.out.println("Canonical path: " + f.getCanonicalPath() );
         } catch (IOException ex) {
           System.out.println("Couldn't determine canonical path.");
         }
        
       // add code for file desriptions here:

         String parent = f.getParent();

         if(parent != null) {
           System.out.println("Parent: " + f.getParent());
         }

         if(f.canWrite()) System.out.println(f.getName() + " is writable");
         if(f.canRead()) System.out.println(f.getName()  + " is readable");

         if(f.isFile()) {
            System.out.println(f.getName() + " is a file");
         } else if (f.isDirectory()) {
            System.out.println(f.getName() + " is a directory");
         } else {
            System.out.println("What is this?!");
         }
         
         if(f.isAbsolute()) {
            System.out.println(f.getPath() + " is an absolute path.");
         } else {
            System.out.println(f.getPath() + " is not an absolute path.");
         }

         long lm = f.lastModified();
         if(lm != 0) System.out.println("Last modified at " + new Date(lm));

         long length = f.length();
         if (length != 0) {
            System.out.println(f.getName() + " is " + length + " bytes long.");
         }


      } else { 
        System.out.println("I'm sorry. I can't find the file " + args[i]);
      } 

    } 
  } 
}