B4J Question Secure my projects source codes

[darabon]

After building my project and release jar file, hackers can access to my source codes
Is there any way to protect codes at least for chicken hackers?
It is important to nobody can access to my sources
Thanks

 

[Erel]

Compile in release (obfuscated) to make it more difficult to decompile your app.

 

[darabon]

Compile in release (obfuscated) to make it more difficult to decompile your app.

Thank you