I wonder whether Ubuntu itself provides a system-wide way to find the current JAVA_HOME or whether there is right place for setting JAVA_HOME. Mac OS X does well in this, for /usr/libexec/java_home command returns the current JAVA_HOME. But to Ubuntu, the materials I found always told me to set the $JAVA_PATH pointing to a static path, which is stored in ~/.bash_profile. I think, however, this approach has several drawbacks:Once Java updates, the mini version number will change, which makes the static path no longer available.After changing the JRE used in my system with update-alternatives, I have to modify $JAVA_HOME in .bash_profile. That extra work is annoying.Some $JAVA_HOME-required programs, is not aware of .bash_profile at all. I have to set $JAVA_HOME in their start-up script, therefore a standard-and-easy way to get $JAVA_HOME seems critical to me.Well, any advice is welcomed. Thanks.
A system-wide way to set or get $JAVA_HOME in Ubuntu?
ubuntu;path;java
A little hacky, but put this line in your /etc/profile for setting it system-wide:export JAVA_HOME=$(dirname $(dirname $(readlink -e /usr/bin/javac)))