title: Email-based sign-up in PlayJava
body: <p>Now I am researching how to implement email-based sing-up in Play Java.  However, I couldn't get any useful information, so can anyone tell me the information?  In other words, can anyone show some links or the easy example of it?</p>
  
  <p>This is <a href="https://www.ibm.com/developerworks/library/wa-playful-web-dev-1-trs-bluemix/" rel="nofollow noreferrer">the example </a> written in Scala, but unfortunately I can't understand well, I am not familiar with Scala...</p>
  
  <p>Any comment is welcome.</p>
  
  <p>EDIT: Some people dislike this question. Maybe they think this is not a good question because I am supposed to reach some answers of this question.
  However, in fact there seems to be no information that help me build email-based authentication when using Java.  In Play Scala, you have many options.  But I want to know how to realize it in Java, not Scala.  So, this question is so meaning for some people who try to build a web app in Play Java.</p>