Mac OS X 10.6.7 Java Path Current JDK confusing

Question

I have trouble understanding (actual paths vs links) for multiple java versions on my Mac OSX. Normally in windows if I have multiple versions installed in my machine, I can

Answer 1

set $JAVA_HOME=$(/usr/libexec/java_home) in your .bash_profile

or export JAVA_HOME=$(/usr/libexec/java_home);

echo $JAVA_HOME