Tony Smith

// FileClient.java
import java.net.*;
import java.io.*;

public class FileClient
{
private static final int SERVERPORT = 9999;
public static void main(String[] argv)
{
String inFileName, s;
try
{
System.out.println("I am a file fetcher");
// Get the filename
BufferedReader keyIn = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter name of file to fetch");
inFileName = keyIn.readLine();
// Open the connection to the server and convert the raw streams
Socket conn = new Socket("my-pc", SERVERPORT);
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
PrintWriter pw = new PrintWriter(new OutputStreamWriter(conn.getOutputStream()), true);
// Send the filename to the server
pw.println(inFileName);
// Read the results line by line, and write them to the display (we could of
// course get a PrintWriter corresponding to a local file, and write the
// results there instead
while ((s = br.readLine()) != null)
System.out.println(s);
br.close();
pw.close();
conn.close();
}
catch (Exception e)
{
System.out.println("Oops.");
}
}
}

// Copier.java
import java.io.*;
public class Copier
{
public static void main(String[] args)
{
String inFileName, outFileName, currentLine;
BufferedReader inFile;
PrintWriter outFile;
// All kinds of i/o errors can jump up and byte us--disk-full errors,
// non-existent files, you name it--so here and in the following files
// we basically wrap everything in a "try"
try
{
System.out.println("I am a file copier");
// Let the user specify the file to be copied and the name of the output
// file. We can get the user's keystrokes from System.in, but System.in is
// a raw InputStream, so we convert it to something friendlier--something
// we can call readLine() on

BufferedReader keyIn = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter input filename:");
inFileName = keyIn.readLine();
System.out.println("Enter output filename:");
outFileName = keyIn.readLine();
keyIn.close();
// With the names in hand, we get the input and output streams of the
// corresponding files, and again turn them into more easily usable objects

inFile = new BufferedReader(new InputStreamReader(new FileInputStream(inFileName)));
outFile = new PrintWriter(new OutputStreamWriter(new FileOutputStream(outFileName)));

// now loop over the input object, reading a line at a time, and writing that
// value to the output object; readLine() is defined to return null when the
// input terminates

while ((currentLine = inFile.readLine()) != null)
outFile.println(currentLine);

// release the streams
inFile.close();
outFile.close();
}
catch (FileNotFoundException e)
{
System.out.println("Couldn't get files.");
}
catch (IOException e)
{
System.out.println("Bad i/o happened.");
}
}
}

// FileServer.java
import java.net.*;
import java.io.*;

public class FileServer
{
private static final int PORT = 9999;
public static void main(String[] argv)
{
String inFileName, currentLine;
try
{
System.out.println("FileServer running");
// Listen for inbound connections, when one comes in, get the Socket object for it,
// and convert the streams of that socket
ServerSocket s = new ServerSocket(PORT, 1);
Socket conn = s.accept();
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
PrintWriter pw = new PrintWriter(new OutputStreamWriter(conn.getOutputStream()), true);
// Get the filename from the client
inFileName = br.readLine();
// Get an input stream for the corresponding file and turn it into a BufferedReader
BufferedReader inFile = new BufferedReader(new InputStreamReader(new FileInputStream(inFileName)));
// Read the file line by line, and write it back over the network
while ((currentLine = inFile.readLine()) != null)
pw.println(currentLine);
br.close();
pw.close();
inFile.close();
conn.close();
}
catch (Exception e)
{
System.out.println("Oops.");
}
}
}

Hi guys!
I was wondering if any of you could help me out. I've basically got 3 Java programs. One is called "Copier.java" which lets the user specify the location of a txt file to be copied to a new location on the computer.
The other two are called "FileServer" and "FileClient" and when they are both running, the client program asks for a txt file to fetch and then displays the contents of the txt file in the command prompt (as using j2sdk1.4.2_02 not Jbuilder etc).
With those files I have to create the following:
To produce an application that sends a string to a server specifying a filename, and the server opens that file and reads(displays) it. The file name and it contents are then sent to a client residing somewhere else on the PC. I knoiw this is easy, but i've never used Java before and any pointers will be very helpful.
Aims:
* To design the above (�file transfer� application)
* To implement the above using TCP sockets
Basically, all I have to do is merge the "Copier.java" program to the "FileServer.java" and "FileClient.java" to acehive this, but i'm getting nowhere!
I'll post the codes below:
Thanks!