ChatThread.java

import java.io.PrintWriter;
import java.net.*;
import java.util.*;

public class ChatThread extends Thread {
    private Socket socket;
    private ServerSocket s_socket;
    private Scanner in;
    public PrintWriter out;
    private String input;

    public ChatThread(ServerSocket ss)
    { s_socket = ss;}
    @Override
    public void run()
    {
        try {
            while (true) {//While ServerFrame is running
                socket=s_socket.accept();
                System.out.println("\n listening on port "+socket.getLocalPort()+
                                   "\n sending on port "+socket.getPort()+"\n\n");
                in = new Scanner(socket.getInputStream()); //From Client
                out = new PrintWriter(socket.getOutputStream()); //To Client
                while (true) {
                    System.out.println("Waiting");
                    if (in.hasNext()) {
                        System.out.println("Got A Line");
                        input = in.nextLine();
                        if (input.equals("start_up123")) {
                            //What if a Client is already connected on this port?
                            System.out.println("Connected");
                            out.println("Connected");
                            out.flush();
                            continue;
                        }
                        System.out.println("Client Said: " + input);
                        if (input.equals("shut_down123")) {
                            in.close();
                            out.close();
                            socket.close();
                            break;
                        }
                        ServerFrame.broadcast(input);
                        // out.println("The Server Heard you Say: " + input);
                        // out.flush();
                    }
                    try {
                        Thread.sleep(500);
                    } catch (InterruptedException e) {
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}