Big Java, Binder Ready Version: Early Objects
Big Java, Binder Ready Version: Early Objects
6th Edition
ISBN: 9781119056447
Author: Cay S. Horstmann
Publisher: WILEY
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Chapter 13, Problem 5PP
Program Plan Intro

Permutation of word

Program plan:

Filename: “NumberPermutationIterator.java”

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

  • Import the required packages.
  • Define a class “NumberPermutationIterator”.
    • Create an integer array “a”.
    • Define the “NumberPermutationIterator()” constructor.
      • Set the size of the array as “n”.
      • Iterate a “for” loop up to “i<n”.
        • Set the value of “i” to array.
    • Define the “nextPermutation()” method.
      • If the length of the array is less than or equal to 1,
        • Return “a”.
      • Iterate a “for” loop,
        • If element at “i-1” is less than element at “i”.
          • Set “length-1” of the array “a”.
          • Iterate a “while” loop,
            • Decrement the value of “j” by 1.
          • Call the method “swap()”.
          • Call the method “reverse()”.
          • Return the value of “a”.
      • Return the value of “a”.
    • Define the “hasMorePermutation()” method.
      • If the length of the array is less than or equal to 1,
        • Return “false”.
      • Iterate a “for” loop,
        • If element at “i-1” is less than element at “i”.
          • Return “true”.
      • Return “false”.
    • Define the “swap()” method.
      • Swap the elements of the array
    • Define the “reverse()” method.
      • While “i” less than “j”,
        • Call the method “swap()”.
        • Increment the value of “i” by 1.
        • Decrement the value of “j” by 1.

Filename: “PermutationIterator.java”

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

  • Import the required packages.
  • Define a class “PermutationIteratorDemo”.
    • Define the “main” method.
      • Define the object “iter” of “PermutationIterator”.
      • Call the method “nextPermutation()” using “iter” and return the value.
      • Print the expected value.
      • Call the method “nextPermutation()” using “iter” and return the value.
      • Print the expected value.
      • Call the method “nextPermutation()” using “iter” and return the value.
      • Print the expected value.
      • Call the method “nextPermutation()” using “iter” and return the value.
      • Print the expected value.
      • Call the method “nextPermutation()” using “iter” and return the value.
      • Print the expected value.
      • Call the method “nextPermutation()” using “iter” and return the value.
      • Print the expected value.
      • Call the method “nextPermutation()” using “iter” and return the value.
      • Print the expected value.

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Chapter 13 Solutions

Big Java, Binder Ready Version: Early Objects

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