(Java) Query NTP Server for Current Date/Time

Demonstrates how to query an NTP server to get the current date/time.

Note: This feature was added in Chilkat v9.5.0.96.

Chilkat Java Downloads Java Libs for Windows, MacOS, Linux, Alpine Linux, Solaris Java Libs for Android

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    // Specify the NTP server domain.
    // Information is passed in a JSON object to allow for any unanticipated future optional information that might need to be provided.
    CkJsonObject json = new CkJsonObject();
    json.UpdateString("ntp_server","pool.ntp.org");

    // Query the NTP server for the current date/time.
    CkDateTime dt = new CkDateTime();
    // Note: The SetFromNtpServer method is available starting in v9.5.0.96 for most Chilkat builds, but not all.
    // If the SetFromNtpServer method is not present, contact support@chilkatsoft.com for a hotfix build.
    // It should be available in all programming languages/platforms starting in v9.5.0.97
    boolean success = dt.SetFromNtpServer(json.emit());
    if (success == false) {
        System.out.println(dt.lastErrorText());
        return;
        }

    // Show the date/time in various formats..
    boolean bLocalTime = true;
    System.out.println(dt.getAsTimestamp(bLocalTime));
    System.out.println(dt.getAsRfc822(bLocalTime));
    System.out.println(dt.GetAsUnixTime(bLocalTime));

    // Sample output:

    // 2023-10-31T09:43:27-05:00
    // Tue, 31 Oct 2023 09:43:27 -0500
    // 1698745407
  }
}