title: Eclipse 2018-09 with OpenJDK 11 on Windows 10
body: <p>I just installed the OpenJDK version of the <a href="http://jdk.java.net/11/" rel="noreferrer">JDK 11 General-Availability Release</a> on Windows 10. I tried to install it as a JRE in the just-released Eclipse 2018-09 (4.9.0), and a message appared in the Eclipse dialog saying:</p>
  
  <blockquote>
    <p>You selected a JRE that this version of Eclipse JDT does not yet support fully. Some of the features may not work as expected.</p>
  </blockquote>
  
  <p>What is the problem?</p>
  
  <ul>
  <li>Does Eclipse 2018-09 not fully support JDK 11?</li>
  <li>Or is it that Eclipse doesn't fully support OpenJDK 11 but supports the Oracle JDK 11?</li>
  <li>What "features" specifically can I expect to "not work as expected"?</li>
  </ul>
  
  <p>Update: From an Internet search, I found some <a href="http://git.eclipse.org/c/jdt/eclipse.jdt.debug.git/commit/?id=fe537b490c3fb11eb9d1818ad6ce23e79775b748" rel="noreferrer">code</a> that seems to indicate that Eclipse has an internal list of known Java versions, and it gives the above message if the new JDK version has a higher version than the known Java versions. (That's how I interpret the code.) Really? Eclipse launched a new 2018-09 version, just days before JDK 11 was released, without updating its list of known Java versions to include Java 11??</p>
  
  <p>Maybe someone has a more authoritative answer.</p>