title: Adding Scala Concurrent Duration To a DateTime
body: <p>How do I add a <code>scala.concurrent.Duration</code> to some Java/Scala representation of time to get a time in the future/past?</p>
  
  <p>I really like how scala <code>Duration</code> adds methods to integers (e.g. <code>10 seconds</code>), so I'm trying to do something of the form:</p>
  
  <pre><code>import java.time.LocalDateTime
  
  val futurePoint: LocalDateTime = LocalDateTime.now + (10 Seconds)
  </code></pre>
  
  <p>I would prefer not use other libraries as suggested <a href="https://stackoverflow.com/questions/3614380/whats-the-standard-way-to-work-with-dates-and-times-in-scala-should-i-use-java">in this answer</a>, I'm trying to stick with Java/Scala language libraries.</p>