Big Java, Binder Ready Version: Early Objects
Big Java, Binder Ready Version: Early Objects
6th Edition
ISBN: 9781119056447
Author: Cay S. Horstmann
Publisher: WILEY
Question
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Chapter 7, Problem 5PP
Program Plan Intro

Magic Squares

Program plan:

Filename: “Square.java”

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

  • Define a class “Square”.
    • Declare the class members “numbers”, “square” and “size”.
    • Define constructor “Square()”.
      • Initialize “numbers”.
    • Define a method “add()”,
      • Call a method “add()” to add elements to “numbers”.
    • Define a method “rowSum()”,
      • Declare a variable “sum”.
      • Iterate a “for” loop,
        • Calculate the row sum and store it in “sum”.
          • Return the value in “sum”.
    • Define a method “columnSum()”,
      • Declare a variable “sum”.
      • Iterate a “for” loop,
        • Calculate the column sum and store it in “sum”.
          • Return the value in “sum”.
    • Define a method “diagonalSum()”,
      • Declare a variable “sum”.
      • Iterate a “for” loop,
        • Declare a variable “j”.
        • If true,
          • Set “j” equal to “i”.
        • If false,
          • Set the value of “j”.
        • Calculate the diagonal sum and store it in “sum”.
            • Return the value in “sum”.
    • Define a method “isMagic()”.
      • Calculate the square root of size of “numbers” and store it in “size”.
      • If square of “size” is not equal to size of “numbers”,
        • Return “false”.
      • Iterate loops,
        • Set the value of “square[i][j]”.
      • Iterate a “for” loop,
        • If index of “n” is equal to -1,
          • Return “false”.
        • Calculate the sum using “diagonalSum()”.
          • If “sum != diagonalSum(false)” is true,
            • §  Return “false”.
          • Iterate a “for” loop,
            • §  If “sum” not equal to “rowSum(i)”,
              • ·        Return “false”.
            • §  If “sum” not equal to “columnSum(i)”,
              • ·         Return “false”.
          • Return “true”.

Filename: “MagicSquareDemo.java”

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

  • Import the required packages.
  • Define a class “MagicSquareDemo”.
    • Define the method “main()”.
      • Define the object “in” of class “Scanner”.
      • Define the object “sq” of class “Square”.
      • Prompt the user to enter the sequence of integers.
      • Iterate a “while” loop,
        • Add the element to “sq” using “add()” method.
      • Call “isMagic()” on “sq” and if the result is true,
        • Print that it is magic square.
      • If the result is false,
        • Print that it is not magic square.

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Chapter 7 Solutions

Big Java, Binder Ready Version: Early Objects

Ch. 7.2 - Prob. 11SCCh. 7.2 - Prob. 12SCCh. 7.3 - Prob. 13SCCh. 7.3 - Prob. 14SCCh. 7.3 - Prob. 15SCCh. 7.3 - Prob. 16SCCh. 7.3 - Prob. 17SCCh. 7.3 - Prob. 18SCCh. 7.3 - Prob. 19SCCh. 7.4 - Prob. 20SCCh. 7.4 - Prob. 21SCCh. 7.4 - Prob. 22SCCh. 7.4 - Prob. 23SCCh. 7.4 - Prob. 24SCCh. 7.5 - Prob. 25SCCh. 7.5 - Prob. 26SCCh. 7.5 - Prob. 27SCCh. 7.5 - Prob. 28SCCh. 7.5 - Prob. 29SCCh. 7.6 - Prob. 30SCCh. 7.6 - Prob. 31SCCh. 7.6 - Prob. 32SCCh. 7.6 - Prob. 33SCCh. 7.6 - Prob. 34SCCh. 7.7 - Declare an array list of integers called primes...Ch. 7.7 - Prob. 36SCCh. 7.7 - Prob. 37SCCh. 7.7 - Prob. 38SCCh. 7.7 - Prob. 39SCCh. 7.7 - Prob. 40SCCh. 7.7 - Prob. 41SCCh. 7.8 - Prob. 42SCCh. 7.8 - Prob. 43SCCh. 7.8 - Prob. 44SCCh. 7 - Prob. 1RECh. 7 - Prob. 2RECh. 7 - Write a program that contains a bounds error. Run...Ch. 7 - Write a loop that reads ten numbers and a second...Ch. 7 - Prob. 5RECh. 7 - Consider the following array: int[] a = { 1, 2, 3,...Ch. 7 - Consider the following array: int[] a = { 1, 2, 3,...Ch. 7 - Prob. 8RECh. 7 - Write Java code for a loop that simultaneously...Ch. 7 - What is wrong with each of the following code...Ch. 7 - Write enhanced for loops for the following...Ch. 7 - Rewrite the following loops without using the...Ch. 7 - Rewrite the following loops using the enhanced for...Ch. 7 - What is wrong with each of the following code...Ch. 7 - For the operations on partially filled arrays...Ch. 7 - Trace the flow of the loop in Section 7.3.4 with...Ch. 7 - Prob. 17RECh. 7 - Prob. 18RECh. 7 - Trace the algorithm for removing an element...Ch. 7 - Give pseudocode for an algorithm that rotates the...Ch. 7 - Prob. 21RECh. 7 - Suppose values is a sorted array of integers. Give...Ch. 7 - A run is a sequence of adjacent repeated values....Ch. 7 - What is wrong with the following method that aims...Ch. 7 - You are given two arrays denoting x- and...Ch. 7 - Solve the quiz score problem described in Section...Ch. 7 - Prob. 27RECh. 7 - Develop an algorithm for finding the most...Ch. 7 - Write Java statements for performing the following...Ch. 7 - Prob. 30RECh. 7 - Section 7.7.7 shows that you must be careful about...Ch. 7 - True or false? All elements of an array are of the...Ch. 7 - How do you perform the following tasks with array...Ch. 7 - Prob. 34RECh. 7 - Prob. 35RECh. 7 - Prob. 36RECh. 7 - Write a program that initializes an array with ten...Ch. 7 - Modify the LargestInArray.java program in Section...Ch. 7 - Write a method sumWithoutSmallest that computes...Ch. 7 - Add a method removeMin to the Student class of...Ch. 7 - Prob. 5PECh. 7 - Write a method that reverses the sequence of...Ch. 7 - Write a program that produces ten random...Ch. 7 - Write a method that implements the algorithm...Ch. 7 - Prob. 9PECh. 7 - Prob. 10PECh. 7 - Consider the following class: public class...Ch. 7 - Add a method public boolean sameValues(Sequence...Ch. 7 - Add a method public boolean sameValues(Sequence...Ch. 7 - Prob. 14PECh. 7 - Prob. 15PECh. 7 - Add a method to the Table class below that...Ch. 7 - Given the Table class of Exercise E7.16, add a...Ch. 7 - Prob. 18PECh. 7 - Prob. 19PECh. 7 - Prob. 20PECh. 7 - Improve the program of Exercise E7.17 by adding...Ch. 7 - Consider the following class: public class...Ch. 7 - Prob. 23PECh. 7 - Prob. 24PECh. 7 - Prob. 1PPCh. 7 - Prob. 2PPCh. 7 - Prob. 3PPCh. 7 - Prob. 4PPCh. 7 - Prob. 5PPCh. 7 - Prob. 6PPCh. 7 - Prob. 7PPCh. 7 - Prob. 8PPCh. 7 - Prob. 9PPCh. 7 - Prob. 10PPCh. 7 - A pet shop wants to give a discount to its clients...Ch. 7 - Prob. 12PPCh. 7 - Prob. 13PPCh. 7 - Prob. 14PPCh. 7 - Prob. 15PPCh. 7 - Prob. 16PPCh. 7 - Prob. 17PPCh. 7 - Prob. 18PPCh. 7 - Prob. 19PPCh. 7 - Prob. 20PPCh. 7 - Prob. 21PPCh. 7 - Prob. 22PPCh. 7 - Prob. 23PPCh. 7 - Prob. 24PPCh. 7 - Prob. 25PP
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