workshop 2

src/CourseRegistrationStarter/Student.java

@@ -5,6 +5,7 @@ public class Student {
     private String name;
     private String studentId;
     private ArrayList<Course> registeredCourses;
+    private int maxCourses = 3;
 
     public Student(String name, String studentId) {
         this.name = name;
@@ -21,19 +22,50 @@ public class Student {
     }
 
     public boolean addCourse(Course c) {
+        //bonus1:جلوگیری از ثبت نام تکراری
+        for (Course course : registeredCourses) {
+            if (course.getCourseCode().equals(c.getCourseCode())) {
+                return false;
+            }
+        }
+        //bonus2:محدودیت برای تکرار
+        if (registeredCourses.size() >= maxCourses) {
+            return false;
+        }
         // TODO: Register the student in the course if capacity allows
-        // Return true if registration was successful, otherwise false
+        if (c.getCapacity()>0){
+            registeredCourses.add(c);
+            c.reduceCapacity();
+            return true;
+        }
         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.contains(c)){
+            registeredCourses.remove(c);
+            c.increaseCapacity();
+            return true;
+        }
         return false;
     }
 
     public void showRegisteredCourses() {
         // TODO: Print all registered courses
+        System.out.println("Registered courses for"+name+":");
+        for (Course c :registeredCourses){
+            System.out.println(c.getCourseName()+"-"+ c.getCourseCode());
+        }
+    }
+    //bonus3
+    public Course findCourseByName(String name){
+
+        for (Course c: registeredCourses){
+            if (c.getCourseName().equalsIgnoreCase(name)){
+                return c;
+            }
+        }
+        return null;
     }
 }