Hello everyone V'lar here, am new to the forum. I am trying to compile my Java Programs from any directory. I know it has something to do with the path and classpath. Someone please assist, thank you in advance?

Welcome to LQ! As you are asking about Java programming, I have moved your thread to the Programming forum.

Compiling with ' javac ' :
1) Add 'Canonical-partners' to "Software sources" in Synaptic" :
Settings → Archives : 'Software sources' → Other Software.

2) Refresh Synaptic with the "Refresh button"
or run : sudo apt-get update
3) Install 'sun-java6-jdk'
4) Use the command : 'sudo update-alternatives --config java
... to check, that /usr/lib/jvm/java-6-sun/jre/bin/java is used.
5) Run 'javac -version' : The reply should be : javac 1.6.0_22

Setting a classpath : I think, it is used only, when you have
some files in a 'non standard path'.

Compiling with ant : '/usr/bin/ant' is provided by the package 'ant'.
..