title: diff implementation in Java
body: <p>I'm looking for a diff implementation in Java. I've seen that Python has its own SequenceMatcher (with difflib), which is exactly what I need... in Java.</p>
  
  <p>Is there any portage? Or is there any other class/library that performs the same in Java?</p>
  
  <p>If not, where can I find the source code of that difflib (if free as in speech) to make my own implementation of SequenceMatcher in Java ?</p>
  
  <p>Unfortunately, Apache Commons Lang doesn't help me much.</p>
  
  <p>Thanks!</p>