Question

_{kindly Explain, briefly IN PLAIN ENGLISH, how this exercise was completed and the algorithm you used}

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// package u10a1_ooconsoleregisterforcourse;

import java.util.Scanner;

/**

*

* @author omora

*/

public class U10A1_OOConsoleRegisterForCourse {

/**

* @param args the command line arguments

*/

public static void main(String[] args) {

// TODO code application logic here

System.out.println("Teacher's Copy");

Scanner input = new Scanner(System.in);

// Courses is an array of course objects

// see the Course.java source code for members of Course

Course[] courses = { new Course("IT1006", 6), new Course("IT4782", 3), new Course("IT4789", 3),

new Course("IT4079", 6), new Course("IT2230", 3), new Course("IT3345", 3), new Course("IT2249", 6) };

// choice is the number selected by the user

int choice;

int totalCredit = 0;

String yesOrNo = "";

do {

choice = getChoice(courses, input);

switch (ValidateChoice(choice, totalCredit, courses)) {

case -1:

System.out.println("**Invalid** - Your selection of " + choice + " is not a recognized course.");

break;

case -2:

System.out.println("**Invalid** - You have already registerd for this " + courses[choice - 1].getCode()

+ " course.");

break;

case -3:

System.out.println("**Invalid** - You can not register for more than 9 credit hours.");

break;

case 0:

System.out.println("Registration Confirmed for course " + courses[choice - 1].getCode());

totalCredit += courses[choice - 1].getCreditHour();

courses[choice - 1].setIsRegisteredFor(true);

break;

}

WriteCurrentRegistration(courses, totalCredit);

System.out.print("\nDo you want to try again? (Y|N)? : ");

yesOrNo = input.next().toUpperCase();

} while (yesOrNo.equals("Y"));

System.out.println("Thank you for registering with us");

}

// This method prints out the selection menu to the user in the form of

// [selection number]Course Code (Course Credit Hours)

// from the courses array one per line

// and then prompts the user to make a number selection

public static int getChoice(Course[] courses, Scanner input) {

System.out.println("Please type the number inside the [] to register for a course");

System.out.println("The number inside the () is the credit hours for the course");

// TO DO

// loop over the courses array and print out the attributes of its

// objects in the format of

// [selection number]Course Code (Course Credit Hours)

// one per line

for(int i=0; i

System.out.println("["+(i+1)+"]"+courses[i].getCode()+" ("+courses[i].getCreditHour()+")");

System.out.print("Enter your choice : ");

return (input.nextInt());

}

// This method validates the user menu selection

// against the given registration business rules

// it returns the following code based on the validation result

// -1 = invalid, unrecognized menu selection

// -2 = invalid, alredy registered for the course

// -3 = invalid, No more than 9 credit hours allowed

// 0 = menu selection is valid

public static int ValidateChoice(int choice, int totalCredit, Course[] courses) {

if (choice < 1 || choice > 7)

return -1;

else if (IsRegisteredBefore(choice, courses))

return -2;

else if ((totalCredit + courses[choice - 1].getCreditHour()) > 9)

return -3;

return 0;

}

// This method checks the courses array of course object to

// see if the course has already been registered for or not

public static boolean IsRegisteredBefore(int choice, Course[] courses) {

for (int i = 0; i < courses.length; i++)

if (courses[choice - 1].getIsRegisteredFor() == true)

return true;

return false;

}

// This method prints the current list of registered courses thus far

// from the courses array separated by , and enclosed inside { }

// It also prints the total credit registered for thus far

public static void WriteCurrentRegistration(Course[] courses, int totalCredit) {

System.out.print("Current course registration: { ");

// TO DO

// loop over the courses array, determine which courses are registered

// for thus and print them out in the format of

// { list of courses separated by , }

boolean isFirst = true;

for(int i=0; i

if(courses[i].getIsRegisteredFor()){

if(!isFirst)

System.out.print(", ");

System.out.print(courses[i].getCode());

isFirst = false;

}

}

System.out.println(" }");

System.out.println("Current registration total credit = " + totalCredit);

}

}

Answer 1

`Hey,

Note: Brother in case of any queries, just comment in box I would be very happy to assist all your queries

Please find the updated code below:

package com.company;

import java.util.Scanner;

/**
 *
 * @author omora
 */
public class U10A1_OOConsoleRegisterForCourse {


    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here

        System.out.println("Teacher's Copy");

        Scanner input = new Scanner(System.in);

        //Courses is an array of course objects
        //see the Course.java source code for members of Course
        Course[] courses = {
                new Course("IT1006", 6),
                new Course("IT4782", 3),
                new Course("IT4789", 3),
                new Course("IT4079", 6),
                new Course("IT2230", 3),
                new Course("IT3345", 3),
                new Course("IT2249", 6)
        };


        //choice is the number selected by the user
        int choice;
        int totalCredit = 0;
        String yesOrNo = "";


        do {

            choice = getChoice(courses, input);

            switch (ValidateChoice(choice, totalCredit, courses)) {
                case -1:
                    System.out.println("**Invalid** - Your selection of " +
                            choice + " is not a recognized course.");
                    break;
                case -2:
                    System.out.println("**Invalid** - You have already registerd for this " +
                            courses[choice-1].getCode() + " course.");
                    break;
                case -3:
                    System.out.println("**Invalid** - You can not register for more than 9 credit hours.");
                    break;
                case 0:
                    System.out.println("Registration Confirmed for course " +
                            courses[choice-1].getCode() );
                    totalCredit += courses[choice-1].getCreditHour();
                    courses[choice-1].setIsRegisteredFor(true);
                    break;
            }

            WriteCurrentRegistration(courses, totalCredit);

            System.out.print("\nDo you want to try again? (Y|N)? : ");

            yesOrNo = input.next().toUpperCase();

        } while (yesOrNo.equals("Y"));

        System.out.println("Thank you for registering with us");
    }

    //This method prints out the selection menu to the user in the form of
    //[selection number]Course Code (Course Credit Hours)
    //from the courses array one per line
    //and then prompts the user to make a number selection
    public static int getChoice(Course[] courses, Scanner input) {
        System.out.println("Please type the number inside the [] to register for a course");
        System.out.println("The number inside the () is the credit hours for the course");

        // TO DO
        // loop over the courses array and print out the attributes of its
        //objects in the format of
        //[selection number]Course Code (Course Credit Hours)
        //one per line

        System.out.print("Enter your choice : ");

        return (input.nextInt());
    }

    //This method validates the user menu selection
    //against the given registration business rules
    //it returns the following code based on the validation result
    // -1 = invalid, unrecognized menu selection
    // -2 = invalid, alredy registered for the course
    // -3 = invalid, No more than 9 credit hours allowed
    // 0 = menu selection is valid

    public static int ValidateChoice(int choice, int totalCredit, Course[] courses) {
        if (choice < 1 || choice > 7)
            return -1;
        else if (IsRegisteredBefore(choice, courses) )
            return -2;
        else if ( (totalCredit + courses[choice-1].getCreditHour()) > 9)
            return -3;
        return 0;
    }

    //This method checks the courses array of course object to
    //see if the course has already been registered for or not
    public static boolean IsRegisteredBefore(int choice, Course[] courses) {
        for(int i = 0; i < courses.length; i++)
            if(courses[choice-1].getIsRegisteredFor() == true)
                return true;
        return false;
    }

    //This method prints the current list of registered courses thus far
    //from the courses array separated by , and enclosed inside { }
    //It also prints the total credit registered for thus far
    public static void WriteCurrentRegistration(Course[] courses, int totalCredit) {

        System.out.print("Current course registration: { " );

        // TO DO
        // loop over the courses array, determine which courses are registered
        //for thus and print them out in the format of
        //{ list of courses separated by , }

        for(Course c: courses){
            if(c.getIsRegisteredFor()){
                System.out.print(c.getCode() + ", ");
            }
        }
        System.out.println("\b\b}" );

        System.out.println("Current registration total credit = " + totalCredit);
    }

}

"C: \Program Files\Java\jdk1.8.0_151\bin\java" Teacher's Copy Please type the number inside the register for a [] to course The number inside the () is the credit hours for the course Enter your choice : 1 Registration Confirmed for course IT1006 registration: { IT1006 Current course Current registration total credit = 6 Do you want to try again? (Y N)? y [ to register for a Please type the number inside the course The number inside the () is the credit hours for the course Enter your choice 2 Registration Confirmed for course IT4782 Current course registration: { IT1006, IT4782 Current registration total credit 9 = Do you want to try again? (Y|N)? n Thank you for registering with us

Kindly revert for any queries

Thanks.