private void go() throws IOException {
        // Create a new selector
        Selector selector = Selector.open();

        // Open a listener on each port, and register each one
        // with the selector
        for (int i = 0; i < ports.length; ++i) {
            ServerSocketChannel ssc = ServerSocketChannel.open();
            ssc.configureBlocking(false);
            ServerSocket ss = ssc.socket();
            InetSocketAddress address = new InetSocketAddress(ports[i]);
            ss.bind(address);

            SelectionKey key = ssc.register(selector, SelectionKey.OP_ACCEPT);

            System.out.println("Going to listen on " + ports[i]);
        }

        while (true) {
            int num = selector.select();

            Set selectedKeys = selector.selectedKeys();
            Iterator it = selectedKeys.iterator();

            while (it.hasNext()) {
                SelectionKey key = (SelectionKey) it.next();

                if ((key.readyOps() & SelectionKey.OP_ACCEPT)
                        == SelectionKey.OP_ACCEPT) {
                    // Accept the new connection
                    ServerSocketChannel ssc = (ServerSocketChannel) key.channel();
                    SocketChannel sc = ssc.accept();
                    sc.configureBlocking(false);

                    // Add the new connection to the selector
                    SelectionKey newKey = sc.register(selector, SelectionKey.OP_READ);
                    it.remove();

                    System.out.println("Got connection from " + sc);
                } else if ((key.readyOps() & SelectionKey.OP_READ)
                        == SelectionKey.OP_READ) {
                    // Read the data
                    SocketChannel sc = (SocketChannel) key.channel();

                    // Echo data
                    int bytesEchoed = 0;
                    while (true) {
                        echoBuffer.clear();

                        int r = sc.read(echoBuffer);

                        if (r <= 0) {
                            break;
                        }

                        echoBuffer.flip();

                        sc.write(echoBuffer);
                        bytesEchoed += r;
                    }

                    System.out.println("Echoed " + bytesEchoed + " from " + sc);

                    it.remove();
                }

            }

//System.out.println( "going to clear" );
//      selectedKeys.clear();
//System.out.println( "cleared" );
        }
    }