Comment 1 for bug 398273

Hi

default-jre-headless provides a default-java symlink in /usr/lib/jvm which is the "default java" for Debian and Ubuntu systems. Alternatively you can probably use a mix of readlink -f + dirname to find the JAVA_HOME for the current system (assuming there is no other java in path).

There has also been an interest in creating a sensible-java command[1], which might be useful for you. However it has not been implemented, there is a mail thread on it on the debian-java list[2].

~Niels

[1] http://wiki.debian.org/Java/SensibleJava

[2] http://lists.debian.org/debian-java/2010/05/msg00014.html