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yes. I make mine with a simple text editor

To execute the classes in a jar file when "opening" the jar file, the jar file must contain a manifest file with a Main-Class: record that names the starting class to be called.

Not sure what a file array is? Can you explain?

You could read each record from the file and put it into the next slot in the array.
The problem with arrays is that you need to make the array...