Java

Generate ULID

See more ULID/UUID Examples

Generate a ULID using a specified timestamp or the current system date timestamp.

Important: Chilkat's ULID functionality was introduced in v9.5.0.94.

Java

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[])
  {
    CkDateTime dt = new CkDateTime();

    // Set dt to the current system date/time.
    dt.SetFromCurrentSystemTime();

    // Generate a ULID for the current UTC date/time.
    // (i.e. the current UTC UNIX-time)
    boolean utc = true;
    String ulid = dt.ulidGenerate(utc);
    System.out.println(ulid);

    // example result: 01GRGCH4J88RECEN4D4VK4F629

    // Generate a ULID using the local timezone's current time.
    utc = false;
    ulid = dt.ulidGenerate(utc);
    System.out.println(ulid);

    // example result: 01GRH14AA82EY9A7S99YYF2QDY

    // -----------------------------------------------
    // To generate a ULID using a specific UNIX timestamp

    // For example, the Unix timestamp for Sun, 05 Feb 2023 14:57:46 GMT
    // is 1675609066

    // For more information about the Epoch Unix Timestamp, see Epoch Unix Timestamp

    // To generate a ULID from a specified date/time, set the CkDateTime and then generate the ULID.
    CkDateTime dt2 = new CkDateTime();
    utc = true;
    dt2.SetFromUnixTime(utc,1675609066);
    ulid = dt2.ulidGenerate(utc);
    System.out.println(ulid);

    // example result: 01GRH1AJGG3P5K04DJHN3QJCX3
  }
}