w3resource

Java Program to Manage Course Details and Online Course Features

Java OOP: Exercise-23 with Solution

Write a Java program to create a class called "Course" with attributes for course name, instructor, and credits. Create a subclass "OnlineCourse" that adds attributes for platform and duration. Implement methods to display course details and check if the course is eligible for a certificate based on duration.

Sample Solution:

Java Code:

Course.java

// Define the Course class
public class Course {
    // Attributes for the course name, instructor, and credits
    private String courseName;
    private String instructor;
    private int credits;

    // Constructor to initialize the Course object
    public Course(String courseName, String instructor, int credits) {
        this.courseName = courseName;
        this.instructor = instructor;
        this.credits = credits;
    }

    // Method to display course details
    public void displayCourseDetails() {
        System.out.println("Course Name: " + courseName);
        System.out.println("Instructor: " + instructor);
        System.out.println("Credits: " + credits);
    }

    // Getter for course name
    public String getCourseName() {
        return courseName;
    }

    // Getter for instructor
    public String getInstructor() {
        return instructor;
    }

    // Getter for credits
    public int getCredits() {
        return credits;
    }
}

Explanation:

Course Class:

  • Attributes: courseName, instructor, and credits.
  • Constructor: Initializes the attributes.
  • displayCourseDetails(): Prints the course details.
  • Getters: Methods to get the values of the attributes.

OnlineCourse.java

// Define the OnlineCourse subclass that extends the Course class
class OnlineCourse extends Course {
    // Additional attributes for the platform and duration
    private String platform;
    private int duration; // duration in hours

    // Constructor to initialize the OnlineCourse object
    public OnlineCourse(String courseName, String instructor, int credits, String platform, int duration) {
        super(courseName, instructor, credits); // Call the superclass constructor
        this.platform = platform;
        this.duration = duration;
    }

    // Method to display course details, including platform and duration
    @Override
    public void displayCourseDetails() {
        super.displayCourseDetails(); // Call the superclass method to display common details
        System.out.println("Platform: " + platform);
        System.out.println("Duration: " + duration + " hours");
    }

    // Method to check if the course is eligible for a certificate based on duration
    public boolean isEligibleForCertificate() {
        // Assume that a course is eligible for a certificate if its duration is at least 10 hours
        return duration >= 10;
    }

    // Getter for platform
    public String getPlatform() {
        return platform;
    }

    // Getter for duration
    public int getDuration() {
        return duration;
    }
}

Explanation:

OnlineCourse Class:

  • Extends Course.
  • Additional Attributes: platform and duration.
  • Constructor: Initializes the attributes, calling the superclass constructor for the common attributes.
  • displayCourseDetails(): Overridden to include additional details specific to online courses.
  • isEligibleForCertificate(): Checks if the course duration is at least 10 hours to be eligible for a certificate.
  • Getters: Methods to get the values of the additional attributes.

Main.java

// Main class to test the Course and OnlineCourse classes
public class Main {
    public static void main(String[] args) {
        // Create a Course object
        Course course = new Course("Java Programming", "Dr. Timaios Pliny", 4);
        course.displayCourseDetails();
        System.out.println();

        // Create an OnlineCourse object
        OnlineCourse onlineCourse = new OnlineCourse("Advanced Java", "Prof. Isacco Lyuba", 4, "Google", 10);
        onlineCourse.displayCourseDetails();
        System.out.println("Eligible for Certificate: " + onlineCourse.isEligibleForCertificate());
    }
}

Explanation:

Main Class:

  • Creates instances of Course and OnlineCourse and demonstrates the usage of their methods.

Output:

Course Name: Java Programming
Instructor: Dr. Timaios Pliny
Credits: 4

Course Name: Advanced Java
Instructor: Prof. Isacco Lyuba
Credits: 4
Platform:  Google
Duration: 10 hours
Eligible for Certificate: true

Java Code Editor:

Improve this sample solution and post your code through Disqus.

Java OOP Previous: Java Program to Manage Customer Purchases with Discounts.
Java OOP Next: Java Program to Manage Electronics Products and Washing Machines.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Become a Patron!

Follow us on Facebook and Twitter for latest update.

It will be nice if you may share this link in any developer community or anywhere else, from where other developers may find this content. Thanks.

https://w3resource.com/java-exercises/oop/java-oop-exercise-23.php