Windows impliementation of simple chat program

Question

import java.io.*;
import java.net.*;
import java.util.Scanner;
public class TCPClient {
   public static void main(String args[]) throws Exception {
     String fromServer;
     String toClient;
     Scanner scanner = new Scanner(System.in);
     BufferedReader inFromUser = new BufferedReader(new InputStreamReader(System.in));
     Socket clientSocket = new Socket("plato", 5454); //Port number
     DataOutputStream outToServer = new DataOutputStream(clientSocket.getOutputStream());
     BufferedReader inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
     System.out.println("<---Connection Established, type 'QUIT' to end this conversation.--->");
     //A message notifying both users about the connection.
     while (true) {
       fromServer = inFromServer.readLine(); //Read message from server.
       System.out.println(fromServer); //Print out the message from the server.
       System.out.println("Enter a message:"); //Server prompts to type a message to Client.
       toClient = scanner.nextLine(); //The message gets read through the Scanner.
       if (toClient.equals("QUIT")) {
         System.out.println("Chat Terminated"); //A message showing that the conversation has ended.
         System.exit(0); //Then the Client closes the conversation.
       } else {
         outToServer.writeBytes("FROM CLIENT: " + toClient + '\n'); //Send the message to Server.
import java.io.*;
import java.net.*;
import java.util.Scanner;
public class TCPServer {
   public static void main(String args[]) throws Exception {
     String fromClient;
      String fromServer;
      Scanner scanner = new Scanner(System.in);
      ServerSocket welcomeSocket = new ServerSocket(5454); //Port Number
      Socket connectionSocket = welcomeSocket.accept();
      BufferedReader inFromClient = new BufferedReader(new InputStreamReader(connectionSocket.getInputStream()));
      DataOutputStream toClient = new DataOutputStream(connectionSocket.getOutputStream());
      System.out.println("<---Connection Established--->"); //A message notifying both users about the connection.
      while (true) { //An infinite loop letting the conversation go on until Client types in "QUIT".
        System.out.println("Enter a message:"); //Client prompts to type a message to Server.
        fromServer = scanner.nextLine(); //The message gets read through the Scanner.
        toClient.writeBytes("FROM SERVER: " + fromServer + '\n'); //It then sends it to the Client.
        fromClient = inFromClient.readLine(); //Read message from the Client.
        System.out.println(fromClient); //Print out the message from the Client.
}What do I need to change in order get this to work with windows command prompt cos I have no idea myself. Bare in mind also that I'll be using this at home to test stuff. It work at uni with unix but department is closed for the holidays.
Thanks

Answer 1

Thanks
I've got another question
import java.io.*;
import java.net.*;
import java.util.Scanner;
import java.math.*;
public class TCPServer {
   public static void main(String args[]) throws Exception {
     String fromClient;
      String fromServer;
      Scanner scanner = new Scanner(System.in);
      ServerSocket welcomeSocket = new ServerSocket(80); //Port Number
      Socket connectionSocket = welcomeSocket.accept();
      BufferedReader inFromClient = new BufferedReader(new InputStreamReader(connectionSocket.getInputStream()));
      DataOutputStream toClient = new DataOutputStream(connectionSocket.getOutputStream());
      System.out.println("<---Connection Established--->"); //A message notifying both users about the connection.
      BigInteger b1 = new BigInteger("41241");
      BigInteger b2 = new BigInteger("29592");
      BigInteger b3 = new BigInteger("69311");
      byte [] a = null;
      a = b1.toByteArray();
      byte [] b = null;
      b = b2.toByteArray();
      byte [] c = null;
      c = b3.toByteArray();
      toClient.write(a, 0, a.length);
      toClient.flush();
      toClient.write(b, 0, b.length);
      toClient.flush();
      toClient.write(c, 0, c.length);
      toClient.flush();
      while (true) { //An infinite loop letting the conversation go on until Client types in "QUIT".
        System.out.println("Enter a message:"); //Client prompts to type a message to Server.
        fromServer = scanner.nextLine(); //The message gets read through the Scanner.
        toClient.writeBytes("FROM SERVER: " + fromServer + '\n'); //It then sends it to the Client.
        fromClient = inFromClient.readLine(); //Read message from the Client.
        System.out.println(fromClient); //Print out the message from the Client.
}Currently I'm sending 3 BigInt numbers in the form of a Byte array.
When I run the TCPServer then the TCPClient, the first message I type from the server side displays some weird looking characters. Im guessing these are the numbers but how can I from the TCPClient side extract these weird looking characters as BigInts and store them (which I can do in a BigInt array or something).
Thanks