title: how to make java enum elements configurable
body: <p>hello guys i'm not sure if the title is descriptive enough.what i mean is creating an enum 
  like so</p>
  
  <pre><code>public enum Test{
    ONE, TWO ,THREE
  }
  </code></pre>
  
  <p>this looks like hard coded.if for some reason i need to add the FOUR some certain business rules evolution reasons.should i code it and deploy it again?
  isn't a way to let it pick the elements from a file , spring config for example or property file?
  THanks for reading.</p>