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<dependency><groupId>commons-net</groupId><artifactId>commons-net</artifactId><version>3.8.0</version></dependency>
Windows 10 ile NTP sunucusunu bulmak için şöyle yaparız
w32tm /query /peers
Örnek
Şöyle yaparız
NTPUDPClient ntpudpClient = new NTPUDPClient();ntpudpClient.setDefaultTimeout(5000);try {InetAddress inetAddress = InetAddress.getByName("192.168.43.32");TimeInfo timeInfo = ntpudpClient.getTime(inetAddress);TimeStamp timeStamp = timeInfo.getMessage().getTransmitTimeStamp();Date date = timeStamp.getDate();SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy/MM/dd hh:mm:ss");simpleDateFormat.format(date);} catch (UnknownHostException e) {...}ntpudpClient.close();
TimeInfo ile şöyle yaparız
timeInfo.computeDetails();
if (timeInfo.getOffset() != null) {
this.timeInfo = timeInfo;
this.offset = timeInfo.getOffset();
}
// This system NTP time
TimeStamp systemNtpTime = TimeStamp.getCurrentTime();
System.out.println("System time:\t" + systemNtpTime + " " + systemNtpTime.toDateString());
// Calculate the remote server NTP time
long currentTime = System.currentTimeMillis();
TimeStamp atomicNtpTime = TimeStamp.getNtpTime(currentTime + offset).getTime()
System.out.println("Atomic time:\t" + atomicNtpTime + " " + atomicNtpTime.toDateString());
TimeInfo ile şöyle yaparız
TimeInfo info = client.getTime(hostAddr);
info.computeDetails(); // compute offset/delay if not already done
Long offsetValue = info.getOffset();
Long delayValue = info.getDelay();
String delay = (delayValue == null) ? "N/A" : delayValue.toString();
String offset = (offsetValue == null) ? "N/A" : offsetValue.toString();
System.out.println(" Roundtrip delay(ms)=" + delay
+ ", clock offset(ms)=" + offset); // offset in ms
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