Create a CollegeCourse class. The class contains fields for the course ID (for e

Question

Create a CollegeCourse class. The class contains fields for the course ID (for example, "CIS 210"), credit hours (for example, 3), and a letter grade (for example, 'A'). Include get and set methods for each field. Create a Student class containing an ID number and an array of five CollegeCourse objects. Create a get() and set() method for the Student ID number. Also create a get() method that returns one of the Student's CollegeCourses; the method takes an integer argument and returns the CollegeCourse in that position (0 through 4). Next, create a set() method that sets the value of one of the Student's CollegeCourses; the method takes two arguments-a CollegeCourse and an integer representing the CollegeCourse's position (0 through 4). Save the files as CollegeCourse.java and Student.java. Write an application that prompts a professor to enter grades for five different courses each for 10 students. Prompt the professor to enter data for one student at a time, including student ID and course data for five courses. Use prompts containing the number of the student whose data is being entered and the course number-for example, "Enter ID for student #s", where s is an integer from 1 through 10, indicating the student, and "Enter course ID #n", where n is an integer from 1 through 5, indicating the course number. Verify that the professor enters only A, B, C, D, or F for the grade value for each course. Save the file as InputGrades.java.

Explanation / Answer

Solution:

package chegg;

import java.util.Arrays;

public class Student {
   int id;
   // array of five course objects
   CollegeCourse[] obj = new CollegeCourse[5];

   // getter and setter
   public int getId() {
       return id;
   }

   public void setId(int id) {
       this.id = id;
   }

   public CollegeCourse getObj(int _id) {
       return obj[_id];
   }

   public void setObj(CollegeCourse _obj, int pos) {
       this.obj[pos] = _obj;
   }

   @Override
   public String toString() {
       return "Student [id=" + id + ", obj=" + Arrays.toString(obj) + "]";
   }

}

___________________________________________________________________

package chegg;

public class CollegeCourse {
   String CIS;
   int creditHours;
   String grade;

   // getter and setter
   public String getCIS() {
       return CIS;
   }

   public void setCIS(String cIS) {
       CIS = cIS;
   }

   public int getCreditHours() {
       return creditHours;
   }

   public void setCreditHours(int creditHours) {
       this.creditHours = creditHours;
   }

   public String getGrade() {
       return grade;
   }

   public void setGrade(String grade) {
       this.grade = grade;
   }

   @Override
   public String toString() {
       return "CollegeCourse [CIS=" + CIS + ", creditHours=" + creditHours + ", grade=" + grade + "]";
   }

}

__________________________________________________________________________

package chegg;

import java.util.Scanner;

public class InputGrades {

   // I am doing it for 2 students here.Please modify it for 10 later.
   public static void main(String[] args) {
       int countStu = 0;

       System.out.println("Please enter grades for five courses per student: ");

       while (countStu < 2) {
           Student stuObj = new Student();
           CollegeCourse courseObj = new CollegeCourse();
           int countCourseId = 0;
           countStu++;
           Scanner scan = new Scanner(System.in);
           System.out.println("Enter ID for student #" + countStu + " : ");
           stuObj.id = scan.nextInt();

           while (countCourseId < 5) {
               countCourseId++;
               System.out.println("Enter course ID #" + countCourseId + " : ");
               courseObj.CIS = scan.next();
               System.out.println("Enter grade " + countCourseId + " : ");
               while (!scan.hasNext("[ABCDFabcdf]")) {
                   System.out.println("Please enter correct grade [A/B/C/D/F]");
                   scan.next();
               }
               courseObj.grade = scan.next();
               stuObj.obj[countCourseId - 1] = courseObj;
           }
           System.out.println("you have entered : " + stuObj);
       }
   }
}

_____________________________________________________________

Sample run:

Please enter grades for five courses per student:

Enter ID for student #1 :
123
Enter course ID #1 :
fgh567
Enter grade 1 :
a
Enter course ID #2 :
fgh5678
Enter grade 2 :
c
Enter course ID #3 :
qwe435
Enter grade 3 :
a
Enter course ID #4 :
fgh567
Enter grade 4 :
a
Enter course ID #5 :
hgjy67
Enter grade 5 :
x
Please enter correct grade [A/B/C/D/F]
a
you have entered : Student [id=123, obj=[CollegeCourse [CIS=hgjy67, creditHours=0, grade=a], CollegeCourse [CIS=hgjy67, creditHours=0, grade=a], CollegeCourse [CIS=hgjy67, creditHours=0, grade=a], CollegeCourse [CIS=hgjy67, creditHours=0, grade=a], CollegeCourse [CIS=hgjy67, creditHours=0, grade=a]]]
Enter ID for student #2 :
999
Enter course ID #1 :
gfht334
Enter grade 1 :
a
Enter course ID #2 :
ghj678
Enter grade 2 :
c
Enter course ID #3 :
jhu888
Enter grade 3 :
h
Please enter correct grade [A/B/C/D/F]
f
Enter course ID #4 :
hfj444
Enter grade 4 :
d
Enter course ID #5 :
hu777
Enter grade 5 :
a
you have entered : Student [id=999, obj=[CollegeCourse [CIS=hu777, creditHours=0, grade=a], CollegeCourse [CIS=hu777, creditHours=0, grade=a], CollegeCourse [CIS=hu777, creditHours=0, grade=a], CollegeCourse [CIS=hu777, creditHours=0, grade=a], CollegeCourse [CIS=hu777, creditHours=0, grade=a]]]

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