Transposing File by each charcaters

Hi,

I am going to write java program to get transpose of a file

Ex:

let abc.txt  contains

abcd bcd

acd bc

bn

and transpose of file contents becomes

aab

bcn

cd

d 

 b

bc

c

d

here it goes,,

package com.sample;

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

import java.util.ArrayList;

public class TransposeFile {

/**

* @param args

*/

public static void main(String[] args) {

BufferedReader br=null;

BufferedWriter bw=null;

try{

br=new BufferedReader(new FileReader("original"));//original file with path

bw=new BufferedWriter(new FileWriter("transpose"));

// transpose file with path if does not exist it will create if valid path

ArrayList< String> lines=new ArrayList<String>();

String line=new String();

while((line=br.readLine())!=null)

{

lines.add(line);

}

int no_of_lines=0;

for(String linu:lines)

{

int j=linu.length();

if(j>no_of_lines)

{

no_of_lines=j;

}

}

int inter=0;

while(inter <no_of_lines)

{

for(int i=0;i<lines.size();i++)

{

if(lines.get(i).length()>inter)

{

bw.write(lines.get(i).charAt(inter));

}

}

bw.newLine();

inter++;

}

}

catch(Exception e)

{

e.printStackTrace();

}

finally

{

try {

br.close();

bw.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

}

Thank you,

Please comment

File Extension change

hi,


here i am going to write you how to change file extension of a folder.

Just copy and paste


import java.io.BufferedReader;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;


public class ToChanegExtension
{

public static void main(String[] args)
{
File  path=new File("G:/songs/new");  //just copy paste the path here
File[] listOfFiles = path.listFiles();
try{
for(File file : listOfFiles) {
String name=file.getName();
if(name.matches(".*\\.jpg"))
{
String newName[]=name.split(".jpg");
File newF=new File("G:/songs/new/"+newName[0]+".mp3");

file.renameTo(newF);
}
}
}
catch(Exception e)
{
System.out.println("In catch");
}
}

}