title: What does the "declare a static final serialVersionUID" warning mean and how to fix?
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/2288937/what-does-it-mean-the-serializable-class-does-not-declare-a-static-final-serial">What does it mean: The serializable class does not declare a static final serialVersionUID field?</a>  </p>
  </blockquote>
  
  
  
  <p>Java compiler warning: <code>The serializable class [*****] does not declare a static final serialVersionUID field of type long.</code></p>
  
  <p>Why? How to fix it?</p>