Oracle JDK vs. OpenJDK

"We build our JDK by taking the open source OpenJDK code base and replace/add certain proprietary (non-OSS) components to it." -- Henrik Stahl at https://blogs.oracle.com/henrik/entry/moving_to_openjdk_as_the#comment-1307877302754

Java on Mac

On Mac, java looks in /Library/Java/JavaVirtualMachines.

Misc

http://docs.oracle.com/javase/7/docs/api/java/lang/UnsupportedOperationException.html

throw new UnsupportedOperationException("Not yet implemented");