title: Looking for SIMPLE persistent store for Java
body: <p>Is there truly no SIMPLE, persistent, embedded solution for Java?</p>
  
  <p>I'm used to (from several years ago) bdb for Python: Dirt-simple, persistent disk hashes. Yet trying to find the same thing now for Java throws up nothing but noise! I get:</p>
  
  <ol>
  <li><p>bdb je (from Oracle)--even discounting the fact that it's from Oracle, this is still much more complex than what I remember!</p></li>
  <li><p>H2/Derby/HSQLDB--require all the overhead of SQL for very simple stores!</p></li>
  <li><p>JDBM3 etc.--still not mature...</p></li>
  </ol>
  
  <p>I could go on...</p>
  
  <p>Surely there must be a simple, persistent, embedded, mature solution.</p>