Ошибка записи в файл!
package com.javarush.task.task19.task1908;
import java.io.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
String name1 = bufferedReader.readLine();
String name2 = bufferedReader.readLine();
BufferedReader bufferedReaderFile = new BufferedReader(new FileReader(name1));
BufferedWriter bufferedWriterFile = new BufferedWriter(new FileWriter(name2));
bufferedReader.close();
Pattern pattern = Pattern.compile("\\d+");
String s = "";
while ((s = bufferedReaderFile.readLine()) != null) {
Matcher m = pattern.matcher(s);
while (m.find()) {
bufferedWriterFile.append(s.substring(m.start(), m.end()));
bufferedWriterFile.append(" ");
}
}
bufferedReaderFile.close();
bufferedWriterFile.close();
}
}