Examen java

package ex;

import java.io.BufferedReader;import java.io.FileInputStream;

import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.PrintWriter;import java.util.StringTokenizer;

public class examenjava{static String file;static String line;static String fg;static int k;public static void main(String[] args) throws IOException{try{InputStream in = new FileInputStream("c:/examenProg/BD.txt"); InputStreamReader is = new InputStreamReader(in);BufferedReader lim = new BufferedReader(is );while((file=lim.readLine())!=null){InputStream bdinn = new FileInputStream("c:/examenProg/voiture/"+file+".txt");InputStreamReader bdinrr = new InputStreamReader(bdinn);BufferedReader buff = new BufferedReader(bdinrr);PrintWriter pw = new PrintWriter("c:/examenProg/voiture_trait/"+file+".txt");line=buff.readLine();k=1;while(line!=null){StringTokenizer st = new StringTokenizer(line,",");while(st.hasMoreElements()){if(k % 2==0){;fg=(String)st.nextElement();pw.write(fg);System.out.println("3) "+fg);k++;}elsek++;}line=buff.readLine();pw.close();}bdinn.close();bdinrr.close();buff.close();}}catch (IOException e){e.printStackTrace();}}}