gistfile1.txt

try {
                    long startTime = System.currentTimeMillis();
                    int port = 8000;
                    InetAddress server = InetAddress.getByAddress("8.8.8.8".getBytes());
                    DatagramSocket socket = new DatagramSocket(port);

                    byte[] buf = new byte[1024];

                    DatagramPacket ping = new DatagramPacket(buf, buf.length, server, port);

                    try {
                        socket.send(ping);

                        socket.setSoTimeout(1000);

                        DatagramPacket response = new DatagramPacket(new byte[1024], 1024);

                        socket.receive(response);

                        long endTime = System.currentTimeMillis();
                        pingTimes.add(endTime - startTime);

                    } catch (IOException e) {
                        e.printStackTrace();
                    }

                } catch (UnknownHostException e) {
                    e.printStackTrace();
                } catch (SocketException e) {
                    e.printStackTrace();
                }