how to convert a long to a much shorter string
<p>Ideally, we would like to take a long(System.currentTimeMillis in java) plus a postfix long as well and convert it to a set of characters+numbers in a much shorter string.  We only want uppercase letters used.  Is there a library for this already as it would seem like a very re-usable library for generating keys that users can type in easier as they are shorter.</p>

<p>I guess I could always write one but it would be nice to easily just grab someone else's code/library.</p>

<p>example</p>

<ul>
<li>0 = 0</li>
<li>1 = 1</li>
<li>2 = 2</li>
<li>the rest digits</li>
<li>11 = A</li>
<li>12 = B</li>
<li>13 = C</li>
</ul>

<p>so I can take a number and reduce the number of digits quite significantly.</p>

<p>thanks,
Dean</p>
