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| − | <p>
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| − | The original solution looks similar to this.
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| − | </p>
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| − | <pre>
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| − | import javax.swing.*;
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| − | public class A2Q2
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| − | {
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| − | //Declare constants
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| − | .
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| − | .
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| − | .
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| − | // main method
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| − | public static void main(String [] args)
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| − | {
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| − | // declare and initialize variables
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| − | .
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| − | .
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| − | .
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| − | // read in user's name as a string
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| − | .
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| − | .
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| − | .
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| − | // calculate sum from name
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| − | for (int r = 0; r < strName.length(); r++)
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| − | {
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| − | .
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| − | .
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| − | .
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| − | }
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| − |
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| − | // collapse sum into a destiny number
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| − | while(intDestiny >= 10)
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| − | {
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| − | .
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| − | .
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| − | .
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| − | }
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| − | // display destiny message
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| − | if(intDestiny == 1)
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| − | System.out.println(strName + DESTINY_ONE);
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| − | else if(intDestiny == 2)
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| − | System.out.println(strName + DESTINY_TWO);
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| − | .
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| − | .
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| − | .
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| − | else
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| − | System.out.println(strName + DESTINY_ERROR);
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| − | }
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| − | }
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| − | </pre>
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| − |
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| − |
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| − | ==Organize the Code==
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| − |
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| − |
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| − | ===Separate the Statements===
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| − | ===Separate Statements into Code Blocks===
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| − | ===Add Comments to Explain the Code===
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| − |
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| − | ==Optimize the Code by Removing Unnecessary Variables==
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| − |
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| − | ==Fix the Errors in the Code==
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| − | The [[Case Study I#Code|messy code]] contained a total of eight different coding errors. Each error presented in this section is ordered as it appears in the [[Case Study I#Code|code]] from the [[Case Study I|case study]].
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| − |
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| − | ==Add Code to Output Progress Reports as the Program Executes==
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| | |SolutionCode= | | |SolutionCode= |
Revision as of 12:39, 3 April 2011
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Problem
Write a complete Java program, similar to the problem Numerology in Case Studies Level Two. If you have not completed the previous problem click here to view problem details. Your goal is to rewrite the solution to use methods.
In particular, you should at least have methods with the following headers:
1. Calculate String Method
public static int calculateString (String name)
This method will accept the name as a String and return the int which directly (i.e., without further collapsing)
corresponds to the name. So if name = “Alan Turing”, the method should return 45.
2. Collapse Integer Method
public static int collapseInt (int currentValue)
This method totally collapses the integer parameter currentValue to a single-digit number. So if currentValue = 88,
then the method should return 7 (and not 16).
3. Print Message Method
public static void printMessage (String name, int magicNumber)
This method should print the final message of the program. The magicNumber is between 1 and 9.
Remember to follow COMP 1010 coding standards.
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Numerology with Methods
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Solution
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Code
Solution Code
import javax.swing.*;
import java.util.Date;
/**
* calculate a check digit for ISBNs
*
* @author: 1010 Instructors
* @version: 2007-September
*/
public class CaseStudy1_ISBN_Solution
{
/**
* PURPOSE: inputs a 9-digit ISBN, calculates the check digit and outputs a 10-digit ISBN
*/
public static void main (String [] args)
{
//variables declared here
String temp; //temporary input string
int isbn; //9-digit ISBN
int digit; //isolated ISBN digit
int total; //total of isbn number when each digit is multiplied by check value
int checkDigit; //value of total%11(as per ISBN standard)
//get input
temp = JOptionPane.showInputDialog
("Enter the first 9 digits of a 10-digit ISBN number.");
isbn = Integer.parseInt(temp);
//confirm input
System.out.println ("You have entered " + temp + ".\n\nThe weighted value of the ISBN is:");
//isolate last digit and multiply by 9
digit = (isbn % 10);
total = digit * 9;
isbn = isbn / 10;
System.out.println (digit + " * " + 9 + " for a running total of " + total);
//isolate next digit and multiply by 8
digit = (isbn % 10);
total = total + digit * 8;
isbn = isbn / 10;
System.out.println (digit + " * " + 8 + " for a running total of " + total);
//isolate next digit and multiply by 7
digit = (isbn % 10);
total = total + digit * 7;
isbn = isbn / 10;
System.out.println (digit + " * " + 7 + " for a running total of " + total);
//isolate next digit and multiply by 6
digit = (isbn % 10);
total = total + digit * 6;
isbn = isbn / 10;
System.out.println (digit + " * " + 6 + " for a running total of " + total);
//isolate next digit and multiply by 5
digit = (isbn % 10);
total = total + digit * 5;
isbn = isbn / 10;
System.out.println (digit + " * " + 5 + " for a running total of " + total);
//isolate next digit and multiply by 4
digit = (isbn % 10);
total = total + digit * 4;
isbn = isbn / 10;
System.out.println (digit + " * " + 4 + " for a running total of " + total);
//isolate next digit and multiply by 3
digit = (isbn % 10);
total = total + digit * 3;
isbn = isbn / 10;
System.out.println (digit + " * " + 3 + " for a running total of " + total);
//isolate next digit and multiply by 2
digit = (isbn % 10);
total = total + digit * 2;
isbn = isbn / 10;
System.out.println (digit + " * " + 2 + " for a running total of " + total);
//isolate next digit and multiply by 1
digit = (isbn % 10);
total = total + digit * 1;
isbn = isbn / 10;
System.out.println (digit + " * " + 1 + " for a running total of " + total);
//calculate check digit
checkDigit = total % 11;
//output weighted total and check digit
System.out.println ("The weighted total is: " + total +
"\nThe check digit is : " + checkDigit +
"\n\nThe 10-digit ISBN is: " + temp + checkDigit);
System.out.println("\nProgrammed by COMP 1010 Instructors");
System.out.println("Date: " + new Date());
System.out.println ("*** End of Processing ***");
}//end main
}//end class
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