Classes and Objects

• Popcorn Hack #1

Popcorn Hack #1

class Book {
    String title;
    int pages;
    
    // Method to print book information
    void printInfo() {
        System.out.println("Title: " + title + ", Pages: " + pages);
    }
}

class MainPopcorn {
    public static void main(String[] args) {
        // Create a Book object
        Book myBook = new Book();
        
        // Set the fields
        myBook.title = "Popcorn Adventures";
        myBook.pages = 120;
        
        // Call the printInfo method
        myBook.printInfo();
    }
}

Homework Hack

class Student {
    String name;
    int grade;
    int pets;
    int siblings;

    // Method to print student information
    void printInfo() {
        System.out.println("Name: " + name + ", Grade: " + grade + ", Pets: " + pets + ", Siblings: " + siblings);
    }
}

class MainClass {
    public static void main(String[] args) {
        // Create three student objects
        Student student1 = new Student();
        student1.name = "Alice";
        student1.grade = 10;
        student1.pets = 2;
        student1.siblings = 1;

        Student student2 = new Student();
        student2.name = "Bob";
        student2.grade = 11;
        student2.pets = 1;
        student2.siblings = 2;

        Student student3 = new Student();
        student3.name = "Charlie";
        student3.grade = 12;
        student3.pets = 0;
        student3.siblings = 3;

        // Print information of all students
        student1.printInfo();
        student2.printInfo();
        student3.printInfo();

        // Create a reference variable for a student with a nickname
        Student nicknameStudent = student1;

        // Output the instance attributes of the student with the nickname
        nicknameStudent.printInfo();
    }
}
MainClass.main(null);

Name: Alice, Grade: 10, Pets: 2, Siblings: 1
Name: Bob, Grade: 11, Pets: 1, Siblings: 2
Name: Charlie, Grade: 12, Pets: 0, Siblings: 3
Name: Alice, Grade: 10, Pets: 2, Siblings: 1