Added the new Enroll Student in course

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

@@ -1,6 +1,7 @@
 package org.example;
 
 import java.util.ArrayList;
+import java.util.Iterator;
 import java.util.List;
 import java.util.Scanner;
 
@@ -418,6 +419,27 @@ public class Administration {
             System.out.println("Course " + courseName + " (" + courseID + ") created successfully.");
         }
     }
+
+    public boolean enrollStudentInCourse(String studentId, String courseId) {
+        Student student = findStudentById(studentId);
+        Course course = findCourseByID(courseId);
+        if (student != null && course != null) {
+            // If the course is not already enrolled
+            if (!student.getCourseGrades().containsKey(course)) {
+                student.getCourseGrades().put(course, "Not Graded");
+                System.out.println("Student " + studentId + " enrolled in course " + courseId + ".");
+                return true;
+            } else {
+                System.out.println("Student " + studentId + " is already enrolled in course " + courseId + ".");
+                return false;
+            }
+        } else {
+            if (student == null) System.out.println("Student ID not found.");
+            if (course == null) System.out.println("Course ID not found.");
+            return false;
+        }
+    }
+
 }
 
 

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

@@ -40,8 +40,13 @@ public class Main {
                     // Register User
                     administration.registerUser();
                     break;
-                case 2:
-                break;
+                case 2: // Enroll Student in Course
+                    System.out.println("Enter Student ID:");
+                    String studentId = scanner.next();
+                    System.out.println("Enter Course ID:");
+                    String courseId = scanner.next();
+                    administration.enrollStudentInCourse(studentId, courseId);
+                    break;
                 case 3:
                     // Enroll Prof to Course
                     break;