Urgent help needed with class file platform transfer

Hi,
I am working at home on Java in the windows (2000) system. Now I have compiled a java source code which compiles fine. This is an applet and works fine.
However, when I am uploading the files( class files generated and the html file) to the Sun Unix system, the applet does not work. My first question is: Does this class file generated in Windows system not transferable in the Unix system?
At this point, I uploaded the java source file to the Unix system. The source file has been created in Textpad in the Windows environment. Now using telnet I used the javac command to compile the source file in Unix system. Now, I am seeing three errors which was not the case in the Windows environment? I have no idea why the same source code is working on one platform and producing error in another?
Any help is highly appreciated. Thanks. Regards.

What are the errors?

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