Java: Manage student courses using the Student class

Java OOP: Exercise-10 with Solution

Write a Java program to create a class called "Student" with a name, grade, and courses attributes, and methods to add and remove courses.

Sample Solution:

Java Code:

 // Student.java
// Import the ArrayList class from the Java Collections Framework
import java.util.ArrayList;

// Define the Student class
public class Student {
  
  // Declare a private variable to store the name of the student
  private String name;
  
  // Declare a private variable to store the grade of the student
  private int grade;
  
  // Declare a private ArrayList to store the courses of the student
  private ArrayList courses;

  // Constructor for the Student class
  public Student(String name, int grade) {
    // Initialize the name of the student
    this.name = name;
    
    // Initialize the grade of the student
    this.grade = grade;
    
    // Initialize the courses ArrayList
    this.courses = new ArrayList();
  }

  // Method to get the name of the student
  public String getName() {
    // Return the name of the student
    return name;
  }

  // Method to get the grade of the student
  public int getGrade() {
    // Return the grade of the student
    return grade;
  }

  // Method to get the courses of the student
  public ArrayList getCourses() {
    // Return the courses ArrayList
    return courses;
  }

  // Method to add a course to the student's course list
  public void addCourse(String course) {
    // Add the given course to the courses ArrayList
    courses.add(course);
  }

  // Method to remove a course from the student's course list
  public void removeCourse(String course) {
    // Remove the given course from the courses ArrayList
    courses.remove(course);
  }

  // Method to print the details of the student
  public void printStudentDetails() {
    // Print the name of the student
    System.out.println("Name: " + name);
    
    // Print the grade of the student
    System.out.println("Grade: " + grade);
  }
}

The above "Student" class has three private attributes: 'name', 'grade', and 'courses'. The 'name' and 'grade' attributes are initialized in the constructor with the values passed as arguments. The 'courses' attribute is initialized as an empty array list. There are getter methods for the 'name', 'grade', and 'courses' attributes. There are also methods to add and remove courses from the 'courses' attribute.

// Main.java

// Define the Main class
public class Main {
  
  // Main method, the entry point of the Java application
  public static void main(String[] args) {
    
    // Create a new Student object named student1 with name "Carolus Vitali" and grade 11
    Student student1 = new Student("Carolus Vitali", 11);
    
    // Create a new Student object named student2 with name "Nakeisha Uhuru" and grade 10
    Student student2 = new Student("Nakeisha Uhuru", 10);
    
    // Create a new Student object named student3 with name "Gabriella Cherice" and grade 10
    Student student3 = new Student("Gabriella Cherice", 10);
    
    // Print a header for student details
    System.out.println("Student Details:");
    
    // Print the details of student1
    student1.printStudentDetails();
    
    // Print the details of student2
    student2.printStudentDetails();
    
    // Print the details of student3
    student3.printStudentDetails();
    
    // Print a message indicating courses are being added for student1
    System.out.println("Adding courses for " + student1.getName());
    
    // Add the course "Math" to student1's courses
    student1.addCourse("Math");
    
    // Add the course "Science" to student1's courses
    student1.addCourse("Science");
    
    // Add the course "English" to student1's courses
    student1.addCourse("English");
    
    // Print student1's name and their list of courses
    System.out.println(student1.getName() + "'s courses: " + student1.getCourses());

    // Print a message indicating courses are being added for student2
    System.out.println("\nAdding courses for " + student2.getName());
    
    // Add the course "History" to student2's courses
    student2.addCourse("History");
    
    // Add the course "Geography" to student2's courses
    student2.addCourse("Geography");
    
    // Add the course "English" to student2's courses
    student2.addCourse("English");
    
    // Print student2's name and their list of courses
    System.out.println(student2.getName() + "'s courses: " + student2.getCourses());
    
    // Print a message indicating the course "Science" is being removed for student1
    System.out.println("\nRemoving 'Science' course for " + student1.getName());
    
    // Remove the course "Science" from student1's courses
    student1.removeCourse("Science");
    
    // Print student1's name and their updated list of courses
    System.out.println(student1.getName() + "'s courses: " + student1.getCourses());
  }
}

The above Main class creates three instances of the Student class, adds courses to their courses list using the “addCourse()” method, and prints out the list of courses for each student using the “getCourses()” method. It then removes a course for student1 using the ‘removeCourse()’ method, and prints out the updated list of courses for student1.

Sample Output:

Student Details:
Name: Carolus Vitali
Grade: 11
Name: Nakeisha Uhuru
Grade: 10
Name: Gabriella Cherice
Grade: 10
Adding courses for Carolus Vitali
Carolus Vitali's courses: [Math, Science, English]

Adding courses for Nakeisha Uhuru
Nakeisha Uhuru's courses: [History, Geography, English]

Removing 'Science' course for Carolus Vitali
Carolus Vitali's courses: [Math, English]

Flowchart:

Java Code Editor:

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