Here are some review questions to give you extra practice with what you have learned so far.
Implement a new static method declared as follows: Note that you cannot assume the user will provide a number; the user can type pretty much anything. So your method should read the input as a String (use SimpleReader.nextLine()), then make sure that the input is an integer number (use FormatChecker.canParseInt()), then convert the string to an integer (use Integer.parseInt()), and finally check that the integer is positive.