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public class Battleship {    public static void main(String[] args){    if (args.length != 2){        System.err.println("Usage: java Battleship N config-file");        }    int testint;    try {        testint = Integer.parseInt(args[0]);        } catch (NumberFormatException nfe) {            System.err.println("Usage: java Battleship N config-file");        }    }}