title: Edit the Java Facet setting in eclipse
body: <p>Some background: I'm getting the dreaded "Java compiler level does not match the version of the installed Java project facet" error in my eclipse project. I'm using Eclipse Helios on OS X Snow Leopard.</p>
  
  <p>I'm having trouble editing the java facet settings for eclipse and maven.  I've searched around and everywhere says to go to Project Properties -> Project Facet and edit the version there.  However for my instance of Eclipse, these settings are not available through the UI.</p>
  
  <p>How do I edit the java facet version manually?</p>