title: How tell which jdk contains which versions of JAX-WS
body: <p>There's a fix in one of the more recent versions of JAXB (2.2.1). I'm trying to determine if that's included in a recent update to Java 6. Is there a way to tell which which versions of a JVM/JRE/JDK contain which versions of JAX-WS/JAXB?</p>
  
  <p>Looking at Sun/Oracle's site, I can view the <a href="http://www.oracle.com/technetwork/java/javase/releasenotes-136954.html">release notes</a> for the latest versions of Java SE 6, but I can't tell which versions of the XML libs are included. I guess I could download the latest JDK and run 'xjc -version', but there should be a better way (esp. if it was added in a previous release - I don't want to keep downloading JREs to tell which was the first with the version of JAXB I'm interested in).</p>