Convert regex into java regex : <p>string should <strong><em>not</em></strong> be longer than 26 alphanumeric characters
string should <strong><em>not</em></strong> begin with <strong>www</strong> OR <strong>api</strong> OR <strong>admin</strong>
string may contain hyphens</p>

<p>I have this regular expression that works: </p>

<pre><code>^(?!www)(?!admin)(?!api)[a-zA-Z0-9.]{1,26}
</code></pre>

<p>Can you help me convert that regex into a java style string regex?</p>
