Practical tips the database has been converted into six-digit and alphabetic strings with its own digital ID. (If you do not want to expose the ID of the registration invitation code) __ Database

Practical tips the database has been converted into six-digit and alphabetic strings with its own digital ID. (If you do not want to expose the ID of the registration invitation code)

public static void Main (string[] args) {

Long i = 124342; String s = long.tostring (i, 36);
System.out.println (String.Format ("%6s", s). Replace ("", "0"));
Long I1 = Long.parselong ("00000" +s, 36);

System.out.println (I1);

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User ID is a self-growing ID, indefinite length, less than six-bit right complement 0.

The generated string can be used when the user's invitation code, a unique identifier, and so on.