title: Regular Expression to remove everything but characters and numbers
body: <p>I would like to remove everything but the Characters a-z,A-Z and 0-9 from a String so I need to create a regular expression for Java's <code>string.replaceAll(regex, "");</code></p>
  
  <p>The old string would look like this:</p>
  
  <pre><code>MAX EUK_1334-PP/B+
  </code></pre>
  
  <p>The new string should look like this:</p>
  
  <pre><code>MAXEUK1334PPB
  </code></pre>