Obfuscate the code

[jayaganesh]

I need to provide the project ear file to the new company, the ear
file would not have the source code, only the class files. But, those class
files can be decompiled using some decompiler giving back the whole source
code. I wants to protect the source code so that the class files cannot
be decompiled. For that I need to obfuscate the code. There are various
tools available for doing that on internet. May I know the best tool that I can use to obfuscate the code?

[staykovmarin]

JMangle is the tool of choice for me.

Note that Obfuscating doesn't stop decompiling, it makes it much harder however.