title: Why can't I import sun packages?
body: <p>I downloaded java 9 from <a href="https://jdk9.java.net" rel="nofollow noreferrer">https://jdk9.java.net</a> and installed it on my Windows 10 machine.<br>
  Java 9 has jshell, which I can use to evaluate and learn java programming.<br>
  Some examples import sun packages, such as <code>sun.audio.*</code> etc. But, in jshell, every time I try to import any sun package, it says the sun package does not exist.  </p>
  
  <p>Some applications do not work with java 9. Perhaps there are incompatibilities? </p>