[Yanel-dev] Unique IDs

[Balz Schreier]

Dear all,

Sometimes we need unique IDs, for identifying a session, a cookie or other
things.

Usually we use the UUID class that comes with Java SE:

UUID.randomUUID().toString() --> 67849f28-c0af-46c7-8421-94f0642e5d4d (128
Bits)

But that is very long and maybe not suitable if you require people to enter
that ID in a form on your web site:


Do you have experience with other number generators?

I see that UUID has also other methods, e.g.:

UUID.randomUUID().getLeastSignificantBits() --> 6174657925133947722 (64
Bits)

   UUID.randomUUID().getMostSignificantBits() --> 5706839542716611039 (64
Bits)



I was recently pointed to this URL where you can generated IDs by
configuring the length and the used characters (digits only etc.):

http://www.thegeeks.us/index.php/Random_Password_Generator_Writen_In_Java


I also posted on stackoverflow.com this question:

http://stackoverflow.com/questions/4666647/how-to-create-user-friendly-uniq=
ue-ids-uuids-or-other-unique-identifiers-in-java


Cheers

Balz
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