How to secure java code [jar file]

 I have been searching an easy way to encrypt my code to ensure my java code security. I have found an easy solution (free solution), May be you might like it : 

I'm useing jCrypt.jar for this here. Go download the file.    

source : https://github.com/wille/jcrypt/releases

How to use jCrypt.jar to encrypt jar file ? 

Step 01 : Make sure you have jCrypt.jar & Bin.jar in the same directory. 

Step 02: Double click jCrypt.jar file.

Step 03: Click Browser button & select the jar file you want to encrypt.  & click next 

Step 05 : Select your Mail file if not automatically selected the right one.  & click next 

Step 06 : Select "Encrypt classes (Resources will be in .jar)" option & click next 

Step 06 : Select the location along with file name where you want to write you file.  & click next 

Done :) close the jCrypt.