Подскажите, а что здесь не так??
package com.javarush.task.task19.task1909;
import java.io.*;
import java.util.ArrayList;
/*
Замена знаков
*/
public class Solution {
public static void main (String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
BufferedReader readingf=new BufferedReader(new FileReader(reader.readLine()));
BufferedWriter fff=new BufferedWriter(new FileWriter(reader.readLine()));
String line;
while ((line = readingf.readLine()) != null){
line.replaceAll("\\.", "!");
fff.write(line);
fff.flush();
}
reader.close();
readingf.close();
fff.close();
}
}