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.

Chilkat2 Java

import com.chilkatsoft.chilkat2.DateTime;

public class ChilkatExample {

    public static void main(String[] args) {
        DateTime dt = new DateTime();

        // 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.
        DateTime dt2 = new DateTime();
        utc = true;
        dt2.setFromUnixTime(utc, 1675609066);
        ulid = dt2.ulidGenerate(utc);
        System.out.println(ulid);

        // example result: 01GRH1AJGG3P5K04DJHN3QJCX3
    }
}