제출 #23553

실행 실패 (제출 코드 컴파일 에러)

Main.java:43: error: method sort in class ArrayList<E> cannot be applied to given types;
        save.sort();
            ^
  required: Comparator<? super String>
  found:    no arguments
  reason: actual and formal argument lists differ in length
  where E is a type-variable:
    E extends Object declared in class ArrayList
1 error