Is there a way to generate a random UUID, which consists only of numbers?

Question

Java\'s UUID class generates a random UUID. But this consists of letters and numbers. For some applications we need only numbers. Is there a way to generate random UUID that

Answer 1

Although the original poster of this question marked @Jigar Joshi's question as the best answer, I'd like to add that there is a rationale to use UUIDs rather than random numbers in certain cases. The difference is that UUIDs are (universally) unique (hence the name) while random numbers are not. It's just a question of probability whether you get the same number twice or even more often when generating random numbers, but this will never happen with UUIDs. Therefore, I'd consider @Chris Eibl's answer as the best one.

Answer 2

Call hashCode() on the UUID to get a unique integer.

Answer 3

Why using the UUID class if you dont need an UUID? It sounds more like you need just a random number which can be achieved by using the java.util.Random class.

Answer 4

String uuid = UUID.randomUUID().toString().replaceAll("-", ""); //strips '-'