Afficher les données dans un tableau

import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.Scanner;

class Classeur
{
   private HashMap<String,LinkedList<ArrayList<String>>> coll;
   
   public Classeur(String nomFichier) throws FileNotFoundException
   {
      coll = new HashMap<String,LinkedList<ArrayList<String>>>();
      
      Scanner texte = new Scanner(new File(nomFichier));
 
      while (texte.hasNextLine())
      {
         ArrayList<String> colonnes = new ArrayList<String>();

         Scanner ligne = new Scanner(texte.nextLine()).useDelimiter(" ");

         while (ligne.hasNext())
            colonnes.add(ligne.next());

         ligne.close();  
       
         if (colonnes.size()>0)
         {
            String key=colonnes.get(0);
            
            if (!coll.containsKey(key))
               coll.put(key,new LinkedList<ArrayList<String>>());

            coll.get(key).add(colonnes);
         }
      }

      texte.close();
   }
   
   public String[][] get(String key)
   {
      LinkedList<ArrayList<String>> data = coll.get(key);

      if (data==null)
         return null;

      String[] tab[] = new String[data.size()][];

      int i=0;
      for (ArrayList<String> a : data)
      {
         tab[i]=new String[a.size()];

         int j=0;
         for (String s : a)
         {
            tab[i][j]=s;
            j++;
         }

         i++;
      }

      return tab;
   }
}

public class Test
{   
   public static void afficher(String[][] tab)
   {
      for (int i=0; i<tab.length; i++)
      {
         try
         {
            System.out.print(tab[i][0]+" ");
            System.out.print(tab[i][1]+" ");
            System.out.print(tab[i][4]+" ");
            System.out.print(tab[i][5]+" ");
            System.out.println(tab[i][6]);
         }
         catch (ArrayIndexOutOfBoundsException e)
         {
            System.out.println("?");
         }
      }
   }
   
   public static void main(String args[]) throws FileNotFoundException
   {
      Classeur c = new Classeur("D:\\test.txt");      
      afficher(c.get("M086A"));
   }   
}

public String[][] get(String key,int...index)
{
   LinkedList<ArrayList<String>> data = coll.get(key);
   
   if (data==null)
      return null;
   
   String tab[][] = new String[data.size()][index.length];
   
   int i=0;
   for (ArrayList<String> a : data)
   {
      int n=a.size();
      
      int j=0;
      for (int k : index)
      {
         tab[i][j] = (k>=0 && k<n) ? a.get(k) : "?";
         j++;
      }
      
      i++;
   }

   return tab;
}

public static void afficher(String[][] tab)
{
   for (int i=0; i<tab.length; i++)
   {
      for (int j=0; j<tab[i].length; j++)
         System.out.print(tab[i][j]+" ");

      System.out.println();
   }
}

public static void main(String args[]) throws FileNotFoundException
{
   Classeur c = new Classeur("D:\\test.txt");      
   afficher(c.get("M086A",0,1,4,5,6));
}