Next time seems to be good outbut

Question about the task

Under discussion

need hint

Read 2 file names from the console.
Output to the second file all of the numbers from the first file.
Separate the numbers with a space.
Close the streams.

Example file content:
12 text var2 14 8v 1

Result:
12 14 1

Requirements:

The program should read file names from the console (use BufferedReader).
The BufferedReader used for reading input from the console must be closed after use.
The program must read the first file's contents (use the BufferedReader constructor that takes a FileReader argument).
The file input stream (BufferedReader) must be closed.
The program must write all of the numbers from the first file, separated by spaces, to the second file (use the BufferedWriter constructor that takes a FileWriter argument).
The file output stream (BufferedWriter) must be closed.

package com.codegym.task.task19.task1908; /* Picking out numbers */ import java.io.*; import java.util.ArrayList; public class Solution { public static void main(String[] args) throws IOException { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); String a = br.readLine(); String b = br.readLine(); br.close(); FileReader fr = new FileReader(a); BufferedReader br1 = new BufferedReader(fr); FileWriter fw = new FileWriter(b); BufferedWriter bw = new BufferedWriter(fw); while (br1.ready()) { String str = br.readLine(); String good = str.replaceAll("\\D+", " "); bw.write(good); } bw.close(); br1.close(); } }

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Guadalupe Gagnon

Level 37 , Tampa, United States

28 March 2019, 14:31

#1 Try to combine the readers together on the initialization step or close them both, so either: 1)BufferedReader br1 = new BufferedReader(new FileReader(a)); or 2)FileReader fr = new FileReader(a); BufferedReader br1 = new BufferedReader(fr); fr.close(); br1.close(); #2 line 23 should be br1.readline(); #3 it looks like you are just removing everything that is not a number, and outputting the rest. The task is not asking for this but requiring you to output the parts of the input that are clean numbers. For example '18' is a clean number, 'v8' is not a clean number. If these two were in the text your code should only output '18' and not '18 8'.