Unique User ID with Java
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How to generate a random alpha-numeric string
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What are the drawbacks with using UUID or GUID as a primary key?
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How do you prevent a user from posting data multiple times on a website
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Are usernames required to be unique?
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Generating a globally unique identifier in Java
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Android: View.setID(int id) programmatically - how to avoid ID conflicts?
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Duplicate id in list
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Getting the real name of an user
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Can I use set instead of List to resolve the duplicate id issue
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Automated way to verify user identity
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How to display name from database using id?
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Storing data / session for anonymous user
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How to make auto generated id function?
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How to Make Multi User Objects Single User?
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Generate an increment ID that is unique for a given value of a foreign key
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Detect user logged on a computer using Java web app
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How can I create an infinite login loop for a specific user?