How to hide the source of class from others?

Good day!
Recently (I'm novice) I found many programs that allow to get from
.class file .java file, e.g. any people can access the source code
of my work...
So, how can I prevent this?
Thank you in advance!

Add an @author tag in your source code, may be some copyright notice/warning (if any) and forget...
anybody who opens ur compilied class will see ur name..
leave the rest to them, let them copy if they need to why bother..
We are moving to open source, right!!! May be some one might report an error/bug, for good.
Sorry if this doesn help,
Sneha.

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How to hide the source of class from others?

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