public static void main(String[] args) {
Context context = ZMQ.context(1);
// Socket to talk to server
Socket requester = context.socket(ZMQ.REQ);
requester.connect("tcp://localhost:5559");
System.out.println("launch and connect client.");
for (int request_nbr = 0; request_nbr < 10; request_nbr++) {
requester.send("Hello", 0);