TCPClient.java

import java.io.*;
import java.net.*;

class TCPClient
{
    private static Thread outputThread;
    private static Thread inputThread;
    private static boolean go_on = true;
    private static String sentence;
    private static Socket clientSocket;
    private static DataOutputStream outToServer;
    private static BufferedReader inFromServer;
    private static  BufferedReader inFromUser;

    public static void main(String argv[]) throws Exception
    {

         System.out.println("starting TCP chat program");
         inFromUser = new BufferedReader(new InputStreamReader(System.in));

         System.out.println("Forbinder til server");
         clientSocket = new Socket("127.0.0.1", 9876);
         System.out.println("Der er forbindelse til serveren! \n");


         outToServer = new DataOutputStream(clientSocket.getOutputStream());
         inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));

         // Output (fra client'en til server)
         outputThread = new Thread(new Runnable() {
                public void run() {
                    while(go_on) {
                        try {
                            System.out.print("Please type your text: ");
                            sentence = inFromUser.readLine();
                            outToServer.writeBytes(sentence + '\n');
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }
                }
            });
        outputThread.start();



         inputThread = new Thread(new Runnable() {
            public void run() {
                while(go_on) {
                    try {
                        sentence = inFromServer.readLine();
                        System.out.println(sentence);
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }

                try { clientSocket.close(); }
                catch (IOException e) { e.printStackTrace(); }
            }
        });
         inputThread.start();


    }

}