JAVA_HOME on Mac OS X

June 27, 2008 Alex Chaffee

For the millionth time, cause I always forget…

Put this in ~/.bashrc:

export JAVA_HOME=/Library/Java/Home

[UPDATE: or this, which according to Mike Swingler, follows the Java version chosen in Java Preferences:

export JAVA_HOME=`/usr/libexec/java_home`

]

Also, run “sudo visudo” and add the line

Defaults        env_keep += "JAVA_HOME"

or else commands like “sudo gem install” won’t be able to find Java.

Without the above, I got the following error (which seemed to have been run through a baby-talk filter) when running “sudo gem install rjb”:

extconf.rb:44: JAVA_HOME is not setted. (RuntimeError)

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