title: In Scala 2.8, how to write (append) a line to a file? Should I use Java clesses or there are native Scala functions for this?
body: <p>In Scala 2.8, how to write (append) a line to a file? Should I use Java clesses or there are native Scala functions for this?</p>
  
  <p>If you can also tell how to replace or remove a particular line from a text file - it'd be also interesting.</p>