Using ntp to get internet time server

Asked Nov 18 '19 at 10:53

Active Nov 18 '19 at 10:53

Viewed 157 times

I am trying to get time from internet using ntp on Net-beans IDE 8.2. I am not getting error but the program keeps running without displaying the time.

I have already added the commons-net-3.6.jar in library. Am I missing something?

Please have a look at my code below. I have taken this code from: How to use an Internet time server to get the time?

package timelookup;
import java.util.Date;
import java.net.InetAddress;
import org.apache.commons.net.ntp.NTPUDPClient;
import org.apache.commons.net.ntp.TimeInfo;

public class TimeLookup {
    public static void main(String[] args)throws Exception {
       String TIME_SERVER = "time-a.nist.gov";   
        NTPUDPClient timeClient = new NTPUDPClient();
        InetAddress inetAddress = InetAddress.getByName(TIME_SERVER);
        TimeInfo timeInfo = timeClient.getTime(inetAddress);
        long returnTime = timeInfo.getReturnTime();
        Date time = new Date(returnTime);
        System.out.println("Time from " + TIME_SERVER + ": " + time);
    }

}

asked Nov 18 '19 at 10:53

Roopan Jaulin

So what happens when you get to the `println` line? – RealSkeptic Nov 18 '19 at 11:04
@RealSkeptic Nothing is displayed – Roopan Jaulin Nov 18 '19 at 11:40
That makes no sense. If you have no exception thrown, then when you run this program, at the very least you should get an output that starts with "Time from" - even if there is no value. Are you sure your program actually terminates and doesn't get stuck in one of the network calls? – RealSkeptic Nov 18 '19 at 11:44
in fact the program keeps running and does not terminate. – Roopan Jaulin Nov 18 '19 at 11:51
So use a debugger, check where it gets stuck, and check the documentation for that call to see how to prevent it from getting stuck. My assumption would be that you have a networking issue. – RealSkeptic Nov 18 '19 at 12:07
ok, thank you, i will try – Roopan Jaulin Nov 18 '19 at 12:09

Using ntp to get internet time server

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