title: How to get tools.jar for OpenJDK 11 on Windows?
body: <p><em>Background</em>: I am trying to build Hadoop for Windows using instructions found <a href="https://wiki.apache.org/hadoop/Hadoop2OnWindows" rel="noreferrer">here</a>.  I have <a href="https://jdk.java.net/11/" rel="noreferrer">OpenJDK 11</a> and have ran into the following issue while running <code>mvn package</code>:</p>
  
  <p><code>Could not resolve dependencies for project org.apache.hadoop:hadoop-annotations:jar:2.5.0-SNAPSHOT: Could not find artifact jdk.tools:jdk.tools:jar:1.6 at specified path C:\Program Files\Java\jdk-11.0.1\..\lib\tools.jar</code></p>
  
  <p>I realised no <code>tools.jar</code> exists in the Windows build of OpenJDK 11.  Would I have to build this from source as well? How can I get the <code>tools.jar</code> Maven artefact for OpenJDK 11?</p>