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What does the posted code have to do with the title of this thread?

I don't know anything about how JGrasp works.

Are you trying to compile the code shown in post#3?
Can you use the javac...

I've never seen that style of error message.
What program are you executing to get that message?

Do you get any error messages from the javac compiler?
The message should show the source with...

Please copy the full text of the error messages and paste it here.

Please edit your post and wrap your code with code tags:


<YOUR CODE HERE>

to get highlighting and preserve formatting.