[Student] interface 분리, ArrayList로 배열 수정 1. interface 분리 package service; public interface StudentService { void list(); void register(); void modify(); void remove(); } 2. ArrayList로 배열 수정 - class StudentServiceImpl List stude.. yermi.tistory.com 1. class RangeException 생성하기 package exception; public class RangeException extends RuntimeException { private int start; private int end; public Rang..