BUILDING JAVA PROGRAMS-TEXT
BUILDING JAVA PROGRAMS-TEXT
5th Edition
ISBN: 2810023481209
Author: REGES
Publisher: PEARSON
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Chapter 14, Problem 1PP
Program Plan Intro

Prime numbers up to “n”

Program plan:

  • Import necessary packages.
  • Create a class “QueueOfPrimes”,
    • Define the method “getPrimes ()” that accepts “n” as parameter,
      • Declare the variable “p”.
      • Create queue of integers.
      • Execute loop to fill the queue with numbers “2” through “n”,
        • Insert the element into the queue.
      • Create queue to store prime numbers.
      • Do the following,
        • Get next prime “p” by removing the first value from the queue.
        • Insert “p” into the queue of primes.
        • Create iterator to loop through queue of integers.
        • Execute loop through queue of numbers,
          • Check whether the number is divisible by “p”,
            • Remove that value.
      • End the loop while “p” is greater than or equal to the square root of “n”.
      • Insert remaining values into the queue of primes.
      • Return the queue of primes.
    • Define the method “main()”,
      • Construct “Scanner” object.
      • Prompt the user to enter “n”.
      • Get the value of “n” from the user.
      • Print the prime values returned from the method “getPrimes()”.

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