Where can I get the source of packages start with `sun` in JDK?

Question

I'm learning java nio, and found the implementation classes are under sun.nio, which seems not provide sources in the jdk1.6/src.zip.

Is there packages open source? And where to find the sources of them?

Answer 1

You can download the java code and native code which implements java.nio at http://download.java.net/openjdk/jdk7/ (see top_dir/j2se/src/share/classes/java/nio/ after extracting the source zip)

Please note that you will be able to see the platform dependent code like the code for Solaris, Linux and Windows as well in this.