Что здесь не так?
package com.javarush.task.task19.task1925;
import java.io.*;
import java.util.ArrayList;
/*
Длинные слова
*/
public class Solution {
public static <line> void main(String[] args) {
String filename = args[0];
String filename2= args[1];
try(BufferedReader reader = new BufferedReader(new FileReader(filename));
BufferedWriter writer = new BufferedWriter(new FileWriter(filename2))){
while (reader.ready()){
String boxwords [] = reader.readLine().split(" ");
StringBuilder builder = new StringBuilder();
for (int i=0;i< boxwords.length;i++){
if (boxwords[i].length()>6)
builder.append(boxwords[i]).append(",");
}
writer.write(builder.toString().substring(0, builder.length()-1));
}
}
catch (Exception e){}
}
}