Thursday Code Puzzler: Count The Lines Of Code

It's Thursday already, so time for another code puzzler. The idea is simple: solve the coding problem as efficiently as you can, in any language or framework that you find suitable.

Note: Even though there really is nothing stopping you from finding a solution to this on the internet, try to keep honest, and come up with your own answer.  It's all about the participation!

Count The Lines Of Code

Write a program that counts the lines of actual code in a Java program. Whitespace and comments don't count. 

Catch up on all our previous puzzlers here