
a.
Explanation of Solution
Program:
File name: “CollegeCourse.java”
//Define a class named CollegeCourse
public class CollegeCourse
{
//Declare the private variables
private String courseID;
private int credits;
private char grade;
//Define a get method that returns the course ID
public String getID()
{
//Return the value
return courseID;
}
//Define a get method that returns the credit hours
public int getCredits()
{
//Return the value
return credits;
}
//Define a get method that returns the letter grade
public char getGrade()
{
//Return the value
return grade;
}
//Define a set method that takes the course ID
public void setID(String idNum)
{
//Assign the value
courseID = idNum;
}
//Define a set method that takes the credit hours
public void setCredits(int cr)
{
//Assign the value
credits = cr;
}
//Define a set method that takes the letter grade
public void setGrade(char gr)
{
//Assign the value
grade = gr;
}
}
File name: “Student...
b.
Explanation of Solution
Program:
File name: “InputGrades.java”
//Import necessary header files
import college.CollegeCourse;
import college.Student;
import javax.swing.*;
//Define a class named InputGrades
public class InputGrades
{
//Define a main method
public static void main(String[] args)
{
//Declare an array to store data of 10 students
Student[] students = new Student[10];
//Declare the variables and initialize the values
int x, y, z;
String courseEntry, entry = "", message;
int idEntry, credits;
char gradeEntry = ' ';
boolean isGoodGrade = false;
final int NUM_COURSES = 5;
//Declare an array to store five grades
char[] grades = {'A', 'B', 'C', 'D', 'F'};
//For loop to be executed until x exceeds 10
for(x = 0; x < students.length; ++x)
{
//Create a student object
Student stu = new Student();
//Prompt the user to enter the student ID
entry = JOptionPane.showInputDialog(null, "For student #" +
(x + 1) + ", enter the student ID");
idEntry = Integer.parseInt(entry);
//Function call
stu.setID(idEntry);
//For loop to be executed until y exceeds 5
for(y = 0; y < NUM_COURSES; ++y)
{
//Prompt the user to enter the course
courseEntry = JOptionPane.showInputDialog(null,
"For student #" + (x + 1) + ", enter course #" +
(y + 1));
//Prompt the user to enter the credits for each //course
entry = JOptionPane.showInputDialog(null,
"For student #" + (x + 1) +
", enter credits for course #" + (y + 1));
credits = Integer.parseInt(entry);
//Assign the value false to isGoodGrade
isGoodGrade = false;
//While the user does not enter isGoodGrade
while(!isGoodGrade)
{
//Prompt the user to enter the grade for //course
entry = JOptionPane.showInputDialog(null,
"For student #" + (x + 1) +
", enter grade for course #" + (y + 1));
gradeEntry = entry...

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Chapter 8 Solutions
Java Programming, Loose-leaf Version
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