请问大家怎么解决的？
package zh.codegym.task.task19.task1925;
import java.io.*;
/*
长字词
*/
public class Solution {
public static void main(String[] args) {
BufferedReader fre = null;
BufferedWriter fwt = null;
try {
fre = new BufferedReader(new FileReader(args[0]));
fwt = new BufferedWriter(new FileWriter(args[1]));
String str = null;
int num = 0;
while((str = fre.readLine()) != null) {
String[] arrstr = str.split(",");
for (int i = 0; i < arrstr.length; i++){
int len = arrstr[i].length();
if (len >= 6){
if (num ==0){
fwt.write(arrstr[i]);
}
else{
fwt.write("," + arrstr[i]);
}
num = 1;
}
}
}
}
catch (IOException e){
}
finally{
try{
fre.close();
fwt.close();
}
catch(IOException e){
}
}
}
}