title: Is it possible to extend a class with no constructors in Java?
body: <p>For unit testing purposes I'm trying to write a <a href="http://en.wikipedia.org/wiki/Mock_object" rel="nofollow noreferrer">mock object</a> of a class with no constructors.</p>
  
  <p>Is this even possible in Java, of is the class simply not extensible?</p>