java uuid
import java.util.UUID;
public class RandomStringUUID {
public static void main(String[] args) {
// Creating a random UUID (Universally unique identifier).
UUID uuid = UUID.randomUUID();
String randomUUIDString = uuid.toString();
System.out.println("Random UUID String = " + randomUUIDString);
System.out.println("UUID version = " + uuid.version());
System.out.println("UUID variant = " + uuid.variant());
}
}