title: replaceAll for StringBuilder with regex support?
body: <p>I've looked in the Java API and some common 3rd party libraries but I'm unable to find a suitable method that will do what String.replaceAll does, except for StringBuilder.</p>
  
  <p>I know that with a little work, it can be done for StringBuffer, but I don't want to go down this road because StringBuffer is slower.</p>
  
  <p>Does anyone know of any 3rd party utilies, or if there is a quick piece of code to implement this functionality?</p>