Что я делаю не так?
package com.javarush.task.task19.task1925;
import java.io.*;
import java.util.ArrayList;
/*
Длинные слова
*/
public class Solution {
public static void main(String[] args) throws IOException{
BufferedReader br = new BufferedReader(new FileReader(args[0]));
BufferedWriter bw = new BufferedWriter(new FileWriter(args[1]));
while (br.ready()){
String[] x = br.readLine().split(" ");
if (x==null){
break;
}
int fl = 0;
for(String i : x){
if(i.length()>6){
if(fl!=0){
bw.write(",");
}
bw.write(i);
fl = 1;
}
}
}
br.close();
bw.close();
}
}