add bonus features

src/CourseRegistrationStarter/Main.java

@@ -27,7 +27,7 @@ public class Main {
         student1.dropCourse(course2);
 
         // 7. Print the final registered course list
-        System.out.printf("%s registered courses:\n", student1.getName());
+        System.out.printf("\n%s\'s registered courses:\n", student1.getName());
         student1.showRegisteredCourses();
 
         System.out.println("\nRemaining informations of courses are as follows: ");

src/CourseRegistrationStarter/RegistrationSystem.java

@@ -24,6 +24,15 @@ public class RegistrationSystem {
         return null;
     }
 
+    public Course findCourseByName(String name){ // search by course name
+        for(Course thisCourse : courses){
+            if(thisCourse.getCourseName() == name){
+                return thisCourse;
+            }
+        }
+        return null;
+    }
+
     public void showAllCourses() {
         // TODO: Print all courses in the system
         System.out.println("Course Name | Course Code | Capacity");

src/CourseRegistrationStarter/Student.java

@@ -5,6 +5,7 @@ public class Student {
     private String name;
     private String studentId;
     private ArrayList<Course> registeredCourses;
+    private int allowedCourses = 2;
 
     public Student(String name, String studentId) {
         this.name = name;
@@ -24,11 +25,15 @@ public class Student {
         // TODO: Register the student in the course if capacity allows
         // Return true if registration was successful, otherwise false
 
-        if(registeredCourses.contains(c)){
+        if(registeredCourses.contains(c)){ // Preventing duplicate course registration
             System.out.printf("%s is already registered for %s\n", c.getCourseName(), name);
             return false;
         }
 
+        if(registeredCourses.size() >= allowedCourses){ // Limiting the number of courses per student
+            System.out.printf("%s has reached his limit for registration.\n", name);
+        }
+
         if(c.reduceCapacity()){ // if enough capacity, reduction happens in this line
             registeredCourses.add(c);
             System.out.printf("%s registered successfully.\n", c.getCourseName());