Java.lang.ArrayIndexOutOfBoundsException

package calcul;



import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class A1 {
 static String Newligne = System.getProperty("line.separator");

 public static void main(String[] args) {

  String csvFile = "d:/new 1.txt";
  String csvFile1 = "d:/requests1.txt";

  List<LineFile> list;
  try {
   list = ListFromTXT(csvFile);

   TXTFromList(list, csvFile1);

   List<LineFile> list1 = ListFromTXT(csvFile1);

   for (int i = 0; i < list1.size(); i++) {

    LineFile lf = list1.get(i);
    System.out.println(lf.getAttribute3() + " + "
      + lf.getAttribute4() + " = " + lf.getAttribute9());
    
    System.out.println(lf.getAttribute3() + " + "
      + lf.getAttribute5() + " = " + lf.getAttribute10());
    
    System.out.println(lf.getAttribute5() + " + "
      + lf.getAttribute4() + " = " + lf.getAttribute11());

   }

  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }

 }

 public static void TXTFromList(List<LineFile> liste_files, String file_name)
   throws IOException {
  File fichier_clt = new File(file_name);

  BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(
    fichier_clt, true));

  for (LineFile lfile : liste_files) {

   String cont = "";
   cont = cont + lfile.getAid() + ",";
   cont = cont + lfile.getAttribute2() + ",";

   cont = cont + lfile.getAttribute3() + ",";

   cont = cont + lfile.getAttribute4() + ",";

   cont = cont + lfile.getAttribute5() + ",";
   cont = cont + lfile.getAttribute6() + ",";
   cont = cont + lfile.getAttribute7() + ",";
   cont = cont + lfile.getAttribute8() + ",";
   cont = cont + lfile.getAttribute9() + ",";
   cont = cont + lfile.getAttribute10() + ",";



   cont = cont + lfile.getAttribute11();

   cont = cont + Newligne;
   cont = cont + Newligne;
   cont = cont + Newligne;

   bufferedWriter.write(cont);
  }
  bufferedWriter.close();

 }

 public static List<LineFile> ListFromTXT(String file_name)
   throws IOException {
  BufferedReader br = null;
  String line = "";
  ArrayList<LineFile> files = new ArrayList<LineFile>();

  try {

   br = new BufferedReader(new FileReader(file_name));
   int cpt = 0;
   while ((line = br.readLine()) != null) {
    if (cpt > 0) {
     String[] ls = line.split(",");

     LineFile lineFile = new LineFile();
     lineFile.setAttribute1(ls[0]);
     lineFile.setAttribute2(ls[1]);
     lineFile.setAttribute3(ls[2]);
     lineFile.setAttribute4(ls[3]);
     lineFile.setAttribute5(ls[4]);
     lineFile.setAttribute6(ls[5]);
     lineFile.setAttribute7(ls[6]);
     lineFile.setAttribute8(ls[7]);


     //
     int att3 = Integer.parseInt(lineFile.getAttribute3());
     int att4 = Integer.parseInt(lineFile.getAttribute4());
     int att5 = Integer.parseInt(lineFile.getAttribute5());


     lineFile.setAttribute9(att3 + att4 + "");
     files.add(lineFile);
     
     

     lineFile.setAttribute10(att3 + att5 + "");
     files.add(lineFile);

     lineFile.setAttribute11(att5 + att4 + "");
     files.add(lineFile);
     
     
     
    }
    cpt++;

   }

   return files;
  } catch (FileNotFoundException e) {
   e.printStackTrace();
   return null;
  } catch (IOException e) {
   e.printStackTrace();
   return null;
  } finally {
   if (br != null) {
    try {
     br.close();
    } catch (IOException e) {
     e.printStackTrace();
     return null;
    }
   }
  }

 }

}