Set up JAVA_HOME to track Java Preferences.app on Mac OS X

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/Applications/Utilities/Java Preferences.appMac 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.

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