workshop done

src/RegistrationSystem.java

@@ -0,0 +1,36 @@
+import java.util.ArrayList;
+
+public class RegistrationSystem {
+    private ArrayList<Course> courses;
+
+    public RegistrationSystem() {
+        courses = new ArrayList<>();
+    }
+
+    public void addCourseToSystem(Course c) {
+        // Add the course to the system
+        courses.add(c);
+    }
+
+    public Course findCourseByCode(String code) {
+        // Search for a course by course code
+        for (Course c : courses) {
+            if (c.getCourseCode().equals(code)) {
+                return c;
+            }
+        }
+        return null;
+    }
+
+    public void showAllCourses() {
+        // Print all courses in the system
+        for (Course c : courses) {
+            System.out.println(
+                    c.getCourseName() + " - " +
+                            c.getCourseCode() +
+                            " | Remaining capacity: " +
+                            c.getCapacity()
+            );
+        }
+    }
+}