//Chapter 13 (File Input and Output), Java Programming, joyce Farrell, 8th edit

Question

//Chapter 13 (File Input and Output), Java Programming, joyce Farrell, 8th edit

//DebugThirteen2.java

//output, need to fix

// Program reads in a file of phone numbers without area codes
// inserts "(312) " in front of each phone number
// and produces an output file with the new complete phone numbers
import java.nio.file.*;
import java.io.*;
import java.nio.channels.FileChannel;
import java.nio.ByteBuffer;
import static java.nio.file.StandardOpenOption.*;
public class DebugThirteen2
{
   public static void main(String[] args)
   {
      Path fileIn =
         Paths.get(C:\Java\Chapter.13\DebugData3.txt);
      Path fileOut =
         Paths.get(C:\Java\Chapter.13\DebugData3New.txt);
      String areaCode = "(312) ";
      String phone;
      InputStream input = null;
      OutputStream output = null
      try
      {
         input = Files.newInputStream(fileIn);
         BufferedReader reader = new BufferedReader
            (new InputStreamReader(input);
         output = Files.newOutputStream(fileOut);
         phone = input.readLine();
         while(phone == null)
         {
            phone = areaCode + phone + System.getProperty("line.separator");
            byte[] phoneBytes = phone.getBytes();
            output.writeln(phoneBytes);
            phone = reader.readline();
         }
         input.close();
       }
       catch (IOException e)
       {
          System.out.println(e);
       }
   }
}

------------------------------------------------

//DebugData1.txt

Somewhere over the rainbow.

-----------------------------------------------

//DebugData2.txt

There's no place like home.
Are you a good witch or a bad witch?t

---------------------------------------------------

//DebugData3.txt

435-9845
239-9845
981-9883
384-5656
875-3784
874-8120
----------------------------------------------------

//DebugData4.txt

steak,20
lobster,30
macaroni,8
spaghetti,10

Explanation / Answer

//store the file in the drive where the execution file exist

import java.nio.file.*;
import java.io.*;
import java.nio.channels.FileChannel;
import java.nio.ByteBuffer;
import java.io.FileReader;
import static java.nio.file.StandardOpenOption.*;
public class DebugThirteen2
{
public static void main(String[] args) throws IOException
{
Path fileIn =
Paths.get("DebugData3.txt");
Path fileOut =
Paths.get("DebugData3New.txt");
String areaCode = "(312) ";
String phone;
InputStream input = null;
OutputStream output = null;
try
{
input = Files.newInputStream(fileIn);
BufferedReader reader = new BufferedReader
(new InputStreamReader(input);
output = Files.newOutputStream(fileOut);
phone = input.readLine();
while(phone == null)
{
phone = areaCode + phone + System.getProperty("line.separator");
byte[] phoneBytes = phone.getBytes();
output.writeln(phoneBytes);
phone = reader.readline();
}
input.close();
}
catch (IOException e)
{
System.out.println(e);
  
}
}
}

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