How to protect protected classes?

I�m Brazilian, and I am learning English language yet. I�ll try to describe my problem.
I am using protected and friendly classes, but it doesn�t avoid anyone to use them, because if someone knows the package name of my protected class, this person can create a class with the same name of the package, and my protected and friendly classes are now unprotected! Anyone can instantiate my classes in this way.
Did anyone go through this situation? Is there solution for it?
Thank you so much!

There is a solution. I created the same post in Programming section of this forum, that is more apropriate, and there a user called Shag-VT posted a solution.
The way to ensure that nobody is getting into your classes is to "seal" the >package in the manifest and then sign the jar with a digital signature.
The followng like contains a discussion of how to add a digital signature to the >jar (it's just the general documentation for a jar file):
http://java.sun.com/j2se/1.4.2/docs/guide/jar/jar.html
It also has a link to another file, which shows how to seal the package. For >convenience, here is the link:
http://java.sun.com/j2se/1.4.2/docs/guide/extensions/spec.html#sealing

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<thread moved, has nothing to do with ABAP Objects. Please choose your forums more carefully in future>
Edited by: Mike Pokraka on Sep 26, 2008 12:50 AM

Hi,
For 4.7 version if you are using tables, there are two options for protection against line break:
- You can protect a line type against page break.
- You can protect several table lines against page break for output in the main area.
Protection against page break for line types
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Protection against page break for several table lines
- Expand the main area of your table node in the navigation tree.
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- Choose the Output Options tab page of the file node and set the Page Protection option. All table lines that are in the file with the Page Protection option set are output on one page.
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