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Java Directory - Directory and File Listing Example in Java
In this section,you will learn how to list files and folders present in the specified directory.

Java Directory - Directory and File Listing Example in Java

This example illustrates how to list files and folders present in the specified directory. This topic is related to the I/O (input/output) of java.io package.

In this example we are using File class of java.io package. The File class is an abstract representation of file and directory pathnames. This class is an abstract, system-independent view of hierarchical pathnames. An abstract pathname has two components:

An optional system-dependent prefix string,
such as a disk-drive specifier, "/" for the UNIX root directory, or "\\" for a Win32 UNC pathname, and
A sequence of zero or more string names.

Explanation

This program list the file of the specified directory. We will be declaring a function called dirlist which lists the contents present in the specified directory.

dirlist(String fname)

The function dirlist(String fname) takes directory name as parameter. The function creates a new File instance for the directory name passed as parameter

File dir = new File(fname);

and retrieves the list of all the files and folders present in the directory by calling list() method on it.

String[] chld = dir.list();

Then it prints the name of files and folders present in the directory.

Code of the Program :


import java.io.*;




 
public class  DirListing{

   private static void dirlist(String fname){


    File dir = new File(fname);

     String[] chld = dir.list();


    if(chld == null){


      System.out.println("Specified directory does not exist or is not a directory.");


      System.exit(0);

     }else{

       for(int i = 0; i < chld.length; i++){


        String fileName = chld[i];


        System.out.println(fileName);

       }

     }

   }


  public static void main(String[] args){

 
    switch(args.length){


      case 0: System.out.println("Directory has not mentioned.");

 
          System.exit(0);


      case 1: dirlist(args[0]);

           System.exit(0);


      default : System.out.println("Multiple files are not allow.");

             System.exit(0);

     }

   }


}

Download Directry Listing Example

� View all related tutorials

Related Tags: c file array class list ui lists method get name using this oo root example where to exam drive store

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Current Comments

3 comments so far (post your own) View All Comments Latest 10 Comments:

private static void dirlist(String fname, int deep) {
File dir = new File(fname);
String[] chld = dir.list();
if (dir.isFile()) {
System.out.println("" + dir.getName());
return;

} else if (dir.isDirectory()) {
System.out.println(fname.substring(fname.lastIndexOf("\\")));
for (int i = 0; i < chld.length; i++) {
dirlist(fname + "\\" + chld[i]);
}
}
}

Posted by flo on Sunday, 12.7.08 @ 07:43am | #82482

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its nice Code it is helpfull for bigners

Posted by Dildar ALi on Tuesday, 01.15.08 @ 14:37pm | #45250

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This one is a real beauty. So simple the code and so powerful the function. Love it. Many thanks.

Posted by Kimtran on Wednesday, 06.13.07 @ 10:29am | #19083

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