Update src/main/java/models/Student.java

src/main/java/models/Student.java

@@ -11,5 +11,28 @@ public class Student extends User {
         this.enrolledCourses = new ArrayList<>();
     }
 
-  //TODO
+    public boolean enrollInCourse(Course course) {
+        if (enrolledCourses.contains(course)) {
+            return false;
+        }
+        enrolledCourses.add(course);
+        course.addStudent(this);
+        return true;
+    }
+
+    public List<Course> getEnrolledCourses() {
+        return enrolledCourses;
+    }
+
+    public String getMyCoursesDisplay() {
+        if (enrolledCourses.isEmpty()) {
+            return " You are not enrolled in any course yet.";
+        } else {
+            StringBuilder sb = new StringBuilder("\n My Courses:\n");
+            for (int i = 0; i < enrolledCourses.size(); i++) {
+                sb.append("  ").append(i+1).append(". ").append(enrolledCourses.get(i)).append("\n");
+            }
+            return sb.toString();
+        }
+    }
 }