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Memory allocation? Every time a variable or object is declared, memory is allocated to store that item. That is done behind the scenes without programmer intervention. Would I expect anyone to put...

Redundant? Error checking must be as frequent as the possibility of the error occurring. Typically, reading and writing to a file is done in loops, and the entire loop can be enclosed in a...

Simply initialize it when you declare it.

Scanner inputFile = null;

You can learn more about why this is important and why it's necessary by reviewing the tutorial on Java variables.