Is there a function in Java that takes in two strings and generates one 16 character string which is unique to the given combination? I dont expect the string to be 100% unique as long as the probability of having 2 conflicting strings is very small (1 in 100,000 for example). Thanks.
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possible duplicate of [Generate UUID in Java](http://stackoverflow.com/questions/325443/generate-uuid-in-java) – APerson Dec 18 '14 at 14:04
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4Concatenate the strings, then hash the combined string using SHA-1 or similar? – DNA Dec 18 '14 at 14:04
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could you give us some example? – rzysia Dec 18 '14 at 14:04
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1read about MessageDigest – Eran Dec 18 '14 at 14:04
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Thank you for all. I ended up using the method proposed by DNA. – user3245747 Dec 18 '14 at 14:47
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You can concatenate both strings and hash them.
Marcin Szymczak
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I'm pretty sure you meant `concatenate`, but I can't edit your post, as changing this one word is too little change. – spoko Dec 18 '14 at 14:13
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If it needs to be truly unique, then a concatenation of the strings which is 16 characters or less is your answer.
Else you have to rely on hashing. But that comes with no guarantee of a probability of clashing.
Your best bet is to use a GUID.
Bathsheba
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