import java.io.*;

import java.util.*;

import java.text.DecimalFormat;

public class filetree1

{

static int x = 0;

static void RecursivePrint(File[] arr, int level)

{

// for-each loop for main directory files

for (File f : arr)

{

// tabs for internal levels

for (int i = 0; i < level; i++)

System.out.print("\t");

if(f.isFile()){

//DecimalFormat df = new DecimalFormat("#.000");

float size = f.length()/1048576;

String newName= (x + f.getName());

x++;

f.renameTo(new File((newName)));

System.out.println(f.getName() + " " + size + " MB");

}

else if(f.isDirectory())

{

float size = f.length();

System.out.println("[" + f.getName() + "]" + size + " MB");

// recursion for sub-directories

RecursivePrint(f.listFiles(), level + 1);

}

}

}

// Driver Method

public static void main(String[] args)

{

// Provide full path for directory(change accordingly)

String maindirpath = "D:\\javaprog";

// File object

File maindir = new File(maindirpath);

// Use this to convert perform any actions in the directory specified in the

File file = new File("./list.txt");

try{

PrintStream fileOut = new PrintStream(file);

System.setOut(fileOut);

}

catch(Exception e) {

}

if(maindir.exists() && maindir.isDirectory())

{

// array for files and sub-directories

// of directory pointed by maindir

File arr[] = maindir.listFiles();

System.out.println("**********************************************");

System.out.println("Files from main directory : " + maindir);

System.out.println("**********************************************");

// Calling recursive method

RecursivePrint(arr, 0);

}

}

}