student registered corses in oop

src/CourseRegistrationStarter/Student.java

@@ -21,19 +21,37 @@ public class Student {
     }
 
     public boolean addCourse(Course c) {
-        // TODO: Register the student in the course if capacity allows
-        // Return true if registration was successful, otherwise false
+        if(registeredCourses.contains(c)){
+            System.out.println("Studend registered in this corse!");
+            return false;
+        }
+        if(c.reduceCapacity()){
+            registeredCourses.add(c);
+            System.out.println("corse added:" + c.getCourseName());
+            return true;
+        }
+        System.out.println("corse is full");
         return false;
     }
 
     public boolean dropCourse(Course c) {
-        // TODO: Remove the course from the student's list
-        // Restore the course capacity if removal was successful
-        // Return true if the course was dropped, otherwise false
+        if(registeredCourses.remove(c)){
+            c.increaseCapacity();
+            System.out.println("corse dropped :" + c.getCourseName());
+            return true;
+        }
+        System.out.println("studend is not registered in this corse!");
         return false;
     }
 
     public void showRegisteredCourses() {
-        // TODO: Print all registered courses
+        System.out.println("registered corses for " + name + ":");
+        if(registeredCourses.isEmpty()){
+            System.out.println("no corses registered");
+            return;
+        }
+        for(Course c : registeredCourses){
+            System.out.println("- " + c.getCourseName() + "/" + c.getCourseCode());
+        }
     }
 }