■ IList 인터페이스를 사용하는 방법을 보여준다.
▶ 예제 코드 (C#)
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using System; SimpleList simpleList = new SimpleList(); Console.WriteLine("리스트 만들기"); simpleList.Add("one" ); simpleList.Add("two" ); simpleList.Add("three"); simpleList.Add("four" ); simpleList.Add("five" ); simpleList.Add("six" ); simpleList.Add("seven"); simpleList.Add("eight"); Console.WriteLine(); simpleList.DisplayStatus(); Console.WriteLine(); Console.WriteLine("[리스트에서 요소 제거하기]"); simpleList.Remove("six"); simpleList.Remove("eight"); Console.WriteLine(); simpleList.DisplayStatus(); Console.WriteLine(); Console.WriteLine("[리스트 끝에 요소 추가하기]"); simpleList.Add("nine"); Console.WriteLine(); simpleList.DisplayStatus(); Console.WriteLine(); Console.WriteLine("[리스트 중간에 요소 삽입하기]"); simpleList.Insert(4, "number"); Console.WriteLine(); simpleList.DisplayStatus(); Console.WriteLine(); Console.WriteLine("[리스트에서 특정 요소 체크하기]"); Console.WriteLine(); Console.WriteLine("리스트가 \"three\"를 포함한다 : {0}", simpleList.Contains("three")); Console.WriteLine("리스트가 \"ten\"을 포함한다 : {0}", simpleList.Contains("ten" )); |
▶ SimpleList.cs
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using System; using System.Collections; /// <summary> /// 심플 리스트 /// </summary> public class SimpleList : IList { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 객체 배열 /// </summary> private object[] objectArray = new object[8]; /// <summary> /// 카운트 /// </summary> private int count; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public // IList #region 리스트 고정 크기 여부 - IsFixedSize /// <summary> /// 리스트 고정 크기 여부 /// </summary> public bool IsFixedSize { get { return true; } } #endregion // IList #region 읽기 전용 여부 - IsReadOnly /// <summary> /// 읽기 전용 여부 /// </summary> public bool IsReadOnly { get { return false; } } #endregion // IList #region 인덱서 - this[index] /// <summary> /// 인덱서 /// </summary> /// <param name="index">인덱스</param> /// <returns>항목</returns> public object this[int index] { get { return this.objectArray[index]; } set { this.objectArray[index] = value; } } #endregion // ICollection #region 카운트 - Count /// <summary> /// 카운트 /// </summary> public int Count { get { return this.count; } } #endregion // ICollection #region 동기화 여부 - IsSynchronized /// <summary> /// 동기화 여부 /// </summary> public bool IsSynchronized { get { return false; } } #endregion // ICollection #region 동기화 객체 - SyncRoot /// <summary> /// 동기화 객체 /// </summary> public object SyncRoot { get { return this; } } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - SimpleList() /// <summary> /// 생성자 /// </summary> public SimpleList() { this.count = 0; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Public // IList #region 추가하기 - Add(value) /// <summary> /// 추가하기 /// </summary> /// <param name="value">값</param> /// <returns>인덱스</returns> public int Add(object value) { if(this.count < this.objectArray.Length) { this.objectArray[this.count] = value; this.count++; return (this.count - 1); } else { return -1; } } #endregion // IList #region 지우기 - Clear() /// <summary> /// 지우기 /// </summary> public void Clear() { this.count = 0; } #endregion // IList #region 포함 여부 구하기 - Contains(value) /// <summary> /// 포함 여부 구하기 /// </summary> /// <param name="value">값</param> /// <returns>포함 여부</returns> public bool Contains(object value) { bool inList = false; for(int i = 0; i < Count; i++) { if(this.objectArray[i] == value) { inList = true; break; } } return inList; } #endregion // IList #region 인덱스 구하기 - IndexOf(value) /// <summary> /// 인덱스 구하기 /// </summary> /// <param name="value">값</param> /// <returns></returns> public int IndexOf(object value) { int index = -1; for(int i = 0; i < Count; i++) { if(this.objectArray[i] == value) { index = i; break; } } return index; } #endregion // IList #region 삽입하기 - Insert(index, value) /// <summary> /// 삽입하기 /// </summary> /// <param name="index">인덱스</param> /// <param name="value">값</param> public void Insert(int index, object value) { if((this.count + 1 <= this.objectArray.Length) && (index < Count) && (index >= 0)) { this.count++; for(int i = Count - 1; i > index; i--) { this.objectArray[i] = this.objectArray[i - 1]; } this.objectArray[index] = value; } } #endregion // IList #region 제거하기 - Remove(value) /// <summary> /// 제거하기 /// </summary> /// <param name="value">값</param> public void Remove(object value) { RemoveAt(IndexOf(value)); } #endregion // IList #region 제거하기 - RemoveAt(index) /// <summary> /// 제거하기 /// </summary> /// <param name="index">인덱스</param> public void RemoveAt(int index) { if((index >= 0) && (index < Count)) { for(int i = index; i < Count - 1; i++) { this.objectArray[i] = this.objectArray[i + 1]; } this.count--; } } #endregion // ICollection #region 복사하기 - CopyTo(array, index) /// <summary> /// 복사하기 /// </summary> /// <param name="array">배열</param> /// <param name="index">인덱스</param> public void CopyTo(Array array, int index) { int j = index; for(int i = 0; i < Count; i++) { array.SetValue(this.objectArray[i], j); j++; } } #endregion // IEnumerable #region 열거자 구하기 - GetEnumerator() /// <summary> /// 열거자 구하기 /// </summary> /// <returns>열거자</returns> public IEnumerator GetEnumerator() { throw new Exception("The method or operation is not implemented."); } #endregion #region 상태 출력하기 - DisplayStatus() /// <summary> /// 상태 출력하기 /// </summary> public void DisplayStatus() { Console.WriteLine("리스트는 {0}개 용량과 현재 {1}개 요소를 갖는다.", this.objectArray.Length, this.count); Console.Write("리스트 : "); for(int i = 0; i < Count; i++) { Console.Write(" {0}", this.objectArray[i]); } Console.WriteLine(); } #endregion } |