title: Differences between Akka Scala and Java
body: <p>I am considering using Akka in one of my projects, but I have to use only Java. A majority of the material (books/articles) are on Scala version, so I am wondering if I use Java I would be a second-class citizen.
  Are there any significant functional/performance differences between the two?</p>
  
  <p>Thanks</p>