refactoring: encapsulated the input handling related with case 9

src/main/java/org/example/Administration.java

@@ -529,24 +529,27 @@ public class Administration {
     }
 
 
-    public boolean assignGradeToStudent(String studentId, String courseId, String grade) {
+    public void assignGradeToStudent(Scanner scanner) {
+        System.out.print("Enter Student ID: ");
+        String studentId = scanner.next();
+        System.out.print("Enter Course ID: ");
+        String courseId = scanner.next();
+        System.out.print("Enter Grade: ");
+        String grade = scanner.next();
+
         Student student = findStudentById(studentId);
-        // First, find the course by ID to ensure it exists in the system.
         Course course = findCourseByID(courseId);
-
         if (student != null && course != null) {
-            // Check if the student is enrolled in the specified course.
+            // Assuming Student class has a method to add or update grade for a course
             if (student.getCourseGrades().containsKey(course)) {
-                // Student is enrolled in the course, proceed to assign the grade.
                 student.getCourseGrades().put(course, grade);
-                return true;
+                System.out.println("Grade assigned successfully.");
             } else {
-                // Student is not enrolled in the specified course.
-                System.out.println("Student is not enrolled in the specified course.");
-                return false;
+                System.out.println("Student " + studentId + " is not enrolled in course " + courseId + ".");
             }
+        } else {
+            System.out.println("Failed to assign grade. Ensure the student and course IDs are correct.");
         }
-        return false;
     }
 
     public void dropStudentFromCourse(String studentID, String courseID){

src/main/java/org/example/Main.java

@@ -86,21 +86,9 @@ public class Main {
                 case 8:
                     administration.viewCourses();
                     break;
-                case 9:{
+                case 9:
                     // Assign Grade to Student
-                    System.out.println("Assign Grade to Student selected");
-                    System.out.print("Enter Student ID: ");
-                    String toBeGradedStudentId = scanner.next();
-                    System.out.print("Enter Course ID: ");
-                    String toBeGradedCourseId = scanner.next();
-                    System.out.print("Enter Grade: ");
-                    String grade = scanner.next();
-                    boolean success = administration.assignGradeToStudent(toBeGradedStudentId, toBeGradedCourseId, grade);
-                    if (success) {
-                        System.out.println("Grade assigned successfully.");
-                    } else {
-                        System.out.println("Failed to assign grade. Ensure the student and course IDs are correct.");
-                    }}
+                    administration.assignGradeToStudent(scanner);
                     break;
                 case 10:
                     // View Grades from Student