Honestly, I have been using Linux for many years. I am unclear about
some basic stuff. In the .bashrc file when using bash shell,
or .profile when using k shell, I always set JAVA_HOME, ANT_HOME etc,
following other people. But, what these are for?
Suppose I have two version of Java on my Linux:
Does that mean, the two commands "javac" & "java" will be:
Can you help me understand these tokens or point me to some materials?
Thank you very much.