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You're welcome. Good luck.

Ok now you see what needs to be where to compile your program.

You need to find someone that can help you configure the IDE you are trying to use.

Is that the name of the package? It looks like the name of a file.
what happened to this:
import jxl.*;

was the jxl.jar file in the same folder with the ExcelDemo.java file? That's the what the above expects.
If not, you need to tell the javac program where to find it by providing a path.

Is that the package name? jxl.jar?
It looks like a filename.

Try using the javac -cp option on the command line to specify the classpath.

To copy the contents of the command prompt window:...

Did you code the import statement correctly?