HTML/Java protection

["confusionvalley" <confusionvalley () netcabo pt>]

Hello all,
I'm interested in having an online game made with java but i would like to protect the .class from downloading it.
It's easy to get that .class and then decompile it and get the source code... basically it's just watch the html code 
of the page that will load the .class and get the name of the class. 
Then you just pick a download program and you get the .class. When you have the .class you decompile it and get the 
source. 
My objective is precisely protect this source code... at least for now... later i'm thinking in turning it open 
source... but for now the idea is just protecting it.
Any idea to protect the file from foreign downloads ? 
 
Best regards,
 Nuno