Chapter 13, Problem 2PP

Program Plan Intro

Enumerating PIN codes

Program plan:

Filename: “PinWordEnumerator.java”

This program file is used to define a class “PinWordEnumerator”. In the code,

• Import the required packages.
• Define a class “PinWordEnumerator”.
  • Create a linked list “dictionary” to hold the words in “words.txt”.
  • Define a method “main()”.
    • Define an object “scan” of class “Scanner”.
    • Prompt the user to enter the pin number.
    • Scan for the pin value.
    • Print new line.
    • Print the statement.
    • Call the method “enumerateWords()”.
  • Define a wrapper method “enumerateWords()”.
    • Call the method “enumerateWords()”.
  • Define a wrapper method “enumerateWords()”.
    • If the length of the pin is “0”,
      • Print the “word”.
        • If the length of the pin is not “0”,
        • • Create a string array “map”.
          • Create a character variable “currentDigit” and set the value.
          • Create a string variable “letters” and get the value from “map”.
          • Define a looping variable “i”.
          • Iterate a “for” loop,
            • Create a string variable “wordCopy”.
            • Call the method “enumerateWords()”.
  • Define a wrapper method “uploadDictionary()”.
    • Create a linked list “list”.
    • Define the “try” block.
      • Scan the file.
      • Iterate a “while” loop to get the tokens of the file.
        • Add the word to the linked list.
        • • Return the linked list.
    • Define the “catch” block.
      • Call “getLogger()”.
    • Return “null”.