Mac OS X’s Java Preferences.app has a pane for switching between versions of the JDK, but I just found out from a coworker (thanks, Mike!) that you can make your shell match that preference easily — just add this to your ~.bashrc:
export JAVA_HOME=$(/usr/libexec/java_home)
If you change your JDK priority preference, you’ll need to re-source your ~/.bashrc or just open a new terminal window.
Software engineering can be described as the orchestration of a quasi-denumerable set of moving parts.
With so many moving parts, breakages occur. One main goal as a “software craftsperson” is to never expose customers to the affects of these breakages. Test-driven development rose from this desire. Accepting that systems break, even in production, motivated loosely coupled and shared-nothing system architectures.
Etherpad was opensourced by google, and has some generic installation instructions. Here’s the translation for Ubuntu Karmic Koala (release 9.10):