source: galcon-server/src/ConnectionListener.java

import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;


public class ConnectionListener {
        /*
         * This thread listens for connections from clients.
         */
        public static boolean running = true;
        private static ServerSocket socketServer;
        private static GameServer gameServer;

        /**
         * @param args
         */
        public static void main(String[] args) {
                gameServer = new GameServer();
                try {
                        socketServer = new ServerSocket(1337);
                        while(running){
                                Socket clientSocket = null;
                                clientSocket = socketServer.accept();
                                System.out.println(clientSocket.getInetAddress()+ ":"+clientSocket.getPort());
                                gameServer.addConnection(clientSocket);
                        }
                } catch (IOException e) {
                        System.out.println("Accept failed: 1337");
                        System.exit(-1);
                }
        }
}