directories

[CaptainPinko]

how do i/what class(es) would i use to make/read directories and find files in them?

something like the "FileSystemObject" in VB?

[BS]

FileDialog fd = new FileDialog(this, "Choos a file");
fd.setVisible(true);
String file = (fd.getDirectory()+ fd.getFile());
jTextField1.setText(file);

[CaptainPinko]

i want to do this w/o a dialog, i'm trying to make a program that will generate a playlist for my MP3 (and it is kinda weird...) so i need to scroll through fil;es and then sort them as such SO I can't use a dialog for more than a base directory, the rest has gotta be from there

[Dillinger4]

java.io.File is where it's at. I used something similar to this to eat through my friends directory structure. Im working on somthing similar written in assembly for the speed.

 import java.io.*;

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

  File entry;
  if(args.length == 0){
     System.out.println("Please specify a directory for scanning");
     return;
  }else {
    entry = new File(args[0]);
  }
  if(!entry.exists()){
    System.out.println("Unable to process request " + entry.getPath() + " is nonexistent ");
    return; 
  }
 listDirectory(entry);
 }

public static void listDirectory(File entry){
  try{
   if(!entry.exists()){
      System.out.println(entry.getName() + "not Found");
  }
  if(entry.isFile()){
     System.out.println(entry.getCanonicalPath());

  }else if (entry.isDirectory()){
     System.out.println(entry.getPath());
     String[] filename  = entry.list();
      
     if(filename == null) return; 
     for(int i = 0; i < filename.length; i++){
       File item = new File(entry.getPath(), filename[i]);
     
     //   list it by a recursive call
        listDirectory(item);
     }
   }
  } catch(IOException e){System.out.print("Error:" + e);} 
 }
}

[CaptainPinko]

huhmmph...
looks good Dil, but could you maybe <drum roll> comment it? <gasp>

[Dillinger4]

Here is the same code which lists empty directories in addition.

import java.io.*;

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

  File entry;
  if(args.length == 0){
     System.out.println("Please specify a directory for scanning");
     return;
  }else {
    entry = new File(args[0]);
  }
  if(!entry.exists()){
    System.out.println("Unable to process request " + entry.getPath() + " is nonexistent ");
    return; 
  }
 listDirectory(entry);
 }

public static void listDirectory(File entry){
  try{
   if(!entry.exists()){
      System.out.println(entry.getName() + "not Found");
  }
  if(entry.isFile()){
     System.out.println(entry.getCanonicalPath());

  }else if (entry.isDirectory()){
     String[] filename  = entry.list();
     if(filename.length == 0){System.out.println(entry.getPath() + " is empty");
     return;
    }
      System.out.println(entry.getPath());
  for(int i = 0; i < filename.length; i++){
       File item = new File(entry.getPath(), filename[i]);
     
     //   list it by a recursive call
        listDirectory(item);
     }
   }
  } catch(IOException e){System.out.print("Error:" + e);} 
 }
}