Big Java Late Objects
Big Java Late Objects
2nd Edition
ISBN: 9781119330455
Author: Horstmann
Publisher: WILEY
Expert Solution & Answer
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Chapter 13, Problem 12RE

Explanation of Solution

Justification:

  • This algorithm begins with the numbers from “0” to “n – 1” in ascending order.
  • It then proceeds until the numbers are in descending order at this point the method “hasMorePermutations()” returns false.
  • At each step a new permutation is made such that the new sequence is lexicographically greater than the previous.
  • For example, “132” is lexicographically greater than “123”; for this specific sequence of numbers one can think more directly of the step as creating a new permutation that is greater than the previous.
  • A new permutation is generated by finding in the previous permutation the rightmost pair of ascending values. That is the pair of ascending values that is nearest to the end of the sequence.
  • The final permutation has already been discovered, if such a pair does not exist...

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