public class Q2Redact { /** * * Q2 Part I (2 marks) * * Open the specified input file. If the redact boolean is false, simply * copy all bytes of the input file to the specified output file. Part II * covers the case where the redact boolean is true. * * * Q2 Part II (3 marks) * * Open the specified input file. If the redact boolean is true then copy all * bytes of the input file directly to the output file, except any credit card * number (a series of 16 digits with optional spaces between them). Credit * card numbers should have all digits replaced with 'X' (but spaces should * remain unchanged). Everything else should be copied directly, * unchanged. * * A credit card number is defined as a sequence of 16 digits with single * space character between zero or more of the digits. If a sequence of more * than 16 digits occurs, then only the first 16 are considered to be a credit * card number and the remainder are treated as normal characters, so are * unchanged. * * Examples (input file contents on left, output on right): * "hi there" -> "hi there" * "hi 1234 5678 there" -> "hi 1234 5678 there" * "hi 1234 5678 1234 5678 there" -> "hi XXXX XXXX XXXX XXXX there" * "hi 12345678 12345678 there" -> "hi XXXXXXXX XXXXXXXX there" * "hi 1234567812345678 there" -> "hi XXXXXXXXXXXXXXXX there" * "hi 1 234567812345678 there" -> "hi X XXXXXXXXXXXXXXX there" * "hi 1234 5678 1234 5678123 there" -> "hi XXXX XXXX XXXX XXXX123 there" * * @param input The name of the input file * @param output The name of the output file * @param redact if true, replace all numbers that are part of a credit card * number with an 'X', and copy all other characters unchanged. */ public static void redact(String input, String output, boolean redact) { // FIXME complete this method } }