Counting the number of lines of code in Ubuntu

We have written so muchCodeBut I have never been able to calculate the exact number of rows, and I don't know how much code I have written. Share this command and declare that it was learned from the webmaster of javaeye:

Code
Find-Type F-INAME"*. Js" -Exec cat {}\;|WC-L

I have been writing JS recently, so it is used to count JS Code. How can I not count. Java? Then you should stop counting ......