while (file1.ready()) {
String[] s = file1.readLine().split(" ");
for (String str : s) {
if (str.equals("\b[0-9]+\b")) {
file2.write(str + " ");
}
package com.javarush.task.task19.task1908;
import java.io.*;
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String name1 = reader.readLine();
String name2 = reader.readLine();
reader.close();
BufferedReader file1 = new BufferedReader(new FileReader(name1));
BufferedWriter file2 = new BufferedWriter(new FileWriter(name2));
while (file1.ready()) {
String[] s = file1.readLine().split(" ");
for (String str : s) {
if (str.equals("\b[0-9]+\b")) {
file2.write(str + " ");
}
}
}
file1.close();
file2.close();
}
}