implement StudentManager.java

src/main/java/dev/service/StudentManager.java

@@ -11,35 +11,24 @@ public class StudentManager {
 
     public void addStudents(ArrayList<Student> newStudents) {
 
-        // TODO:
-
-        // Merge students
-
-        // Hint:
-        // addAll()
+        if(newStudents != null){
+            this.students.addAll(newStudents);
+        }
 
     }
 
     public Student searchStudent(int id) {
 
-        // TODO:
-
-        // Loop through students
-
-        // Compare IDs
+        for(Student s : students) {
+            if(s.getId() == id ) return s;
+        }
 
         return null;
     }
 
     public boolean removeStudent(int id) {
 
-        // TODO:
-
-        // Find student
-
-        // Remove student
-
-        return false;
+       return students.removeIf(s -> s.getId() == id);
     }
 
     public void printStudents() {