CS考试辅导 COMP1110 Final Exam, Question 2

package comp1110.exam;

* COMP1110 Final Exam, Question 2
public class Q2Redact {

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* 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

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