Hello World client in Java

package guide;

//
// Hello World client in Java
// Connects REQ socket to tcp://localhost:5555
// Sends "Hello" to server, expects "World" back
//

import org.zeromq.SocketType;
import org.zeromq.ZMQ;
import org.zeromq.ZContext;

public class hwclient
{
public static void main(String[] args)
{
try (ZContext context = new ZContext()) {
// Socket to talk to server
System.out.println("Connecting to hello world server");

ZMQ.Socket socket = context.createSocket(SocketType.REQ);
socket.connect("tcp://localhost:5555");

for (int requestNbr = 0; requestNbr != 10; requestNbr++) {
String request = "Hello";
System.out.println("Sending Hello " + requestNbr);
socket.send(request.getBytes(ZMQ.CHARSET), 0);

byte[] reply = socket.recv(0);
System.out.println(
"Received " + new String(reply, ZMQ.CHARSET) + " " +
requestNbr
);
}
}
}
}