Source code: maddany/ChatListener.java

   package maddany;
   
   import java.io.*;
   import java.net.*;
   
   public class ChatListener implements Runnable {
       private Wakable parent;
       private ServerSocket ssock;
       private Thread runner;
  
      public ChatListener(int port, Wakable parent) {
          try {
              ssock = new ServerSocket(port);
              this.parent = parent;
              runner = new Thread(this);
              runner.start();
          } catch(IOException e) {
              e.printStackTrace();
          }
      }
  
      public void run() {
          while(Thread.currentThread()==runner) {
              try {
                  Socket sock = ssock.accept();
                  System.out.println("Connection accepted");
                  ChatHandshaker shaker = new ChatHandshaker(sock, parent); 
              } catch(IOException e) {
                  e.printStackTrace();
                  continue;
              }
          }
      }
  
      public void stop() {
          runner.interrupt();
          runner = null;
          try {
              ssock.close();
          } catch(IOException e) {
              e.printStackTrace();
          }
      }
  }