ArrayList.Insert 메서드

아티클
08/21/2007

ArrayList의 지정된 인덱스에 요소를 삽입합니다.

네임스페이스: System.Collections
어셈블리: mscorlib(mscorlib.dll)

구문

‘선언
Public Overridable Sub Insert ( _
    index As Integer, _
    value As Object _
)
‘사용 방법
Dim instance As ArrayList
Dim index As Integer
Dim value As Object

instance.Insert(index, value)

public virtual void Insert (
    int index,
    Object value
)

public:
virtual void Insert (
    int index, 
    Object^ value
)

public void Insert (
    int index, 
    Object value
)

public function Insert (
    index : int, 
    value : Object
)

매개 변수

index
0부터 시작하는 인덱스이며 value를 삽입해야 합니다.

value
삽입할 Object입니다. 값은 Null 참조(Visual Basic의 경우 Nothing)이 될 수 있습니다.

예외

예외 형식	조건
ArgumentOutOfRangeException	index가 0보다 작은 경우 - 또는 - index는 Count보다 큽니다.
NotSupportedException	ArrayList가 읽기 전용인 경우 - 또는 - ArrayList의 크기가 고정되어 있는 경우

ArgumentOutOfRangeException

index가 0보다 작은 경우

- 또는 -

index는 Count보다 큽니다.

NotSupportedException

ArrayList가 읽기 전용인 경우

- 또는 -

ArrayList의 크기가 고정되어 있는 경우

설명

ArrayList은 Null 참조(Visual Basic의 경우 Nothing)을 유효한 값으로 받아들이며 중복 요소를 허용합니다.

Count가 이미 Capacity와 같으면 내부 배열을 자동으로 재할당하여 ArrayList의 용량이 증가하며 기존 요소가 새 배열에 복사된 후 새 요소가 추가됩니다.

index가 Count와 같으면 value가 ArrayList의 끝에 추가됩니다.

목록과 같은 연속 요소 컬렉션에서 삽입 지점 다음에 오는 요소는 새 요소를 수용할 수 있도록 아래로 이동합니다. 컬렉션이 인덱싱되면 이동되는 요소의 인덱스도 업데이트됩니다. 이 동작은 개념적으로 요소가 해시 테이블과 같은 버킷으로 그룹화되는 컬렉션에는 적용되지 않습니다.

이 메서드는 O(n) 연산이며, 여기서 n은 Count입니다.

예제

다음 코드 예제에서는 ArrayList에 요소를 삽입하는 방법을 보여 줍니다.

Imports System
Imports System.Collections
Imports Microsoft.VisualBasic

Public Class SamplesArrayList    
    
    Public Shared Sub Main()
        
        ' Creates and initializes a new ArrayList using Insert instead of Add.
        Dim myAL As New ArrayList()
        myAL.Insert(0, "The")
        myAL.Insert(1, "fox")
        myAL.Insert(2, "jumps")
        myAL.Insert(3, "over")
        myAL.Insert(4, "the")
        myAL.Insert(5, "dog")
        
        ' Creates and initializes a new Queue.
        Dim myQueue As New Queue()
        myQueue.Enqueue("quick")
        myQueue.Enqueue("brown")
        
        ' Displays the ArrayList and the Queue.
        Console.WriteLine("The ArrayList initially contains the following:")
        PrintValues(myAL)
        Console.WriteLine("The Queue initially contains the following:")
        PrintValues(myQueue)
        
        ' Copies the Queue elements to the ArrayList at index 1.
        myAL.InsertRange(1, myQueue)
        
        ' Displays the ArrayList.
        Console.WriteLine("After adding the Queue, the ArrayList now contains:")
        PrintValues(myAL)
        
        ' Search for "dog" and add "lazy" before it.
        myAL.Insert(myAL.IndexOf("dog"), "lazy")
        
        ' Displays the ArrayList.
        Console.WriteLine("After adding ""lazy"", the ArrayList now contains:")
        PrintValues(myAL)
        
        ' Add "!!!" at the end.
        myAL.Insert(myAL.Count, "!!!")
        
        ' Displays the ArrayList.
        Console.WriteLine("After adding ""!!!"", the ArrayList now contains:")
        PrintValues(myAL)
        
        ' Inserting an element beyond Count throws an exception.
        Try
            myAL.Insert(myAL.Count + 1, "anystring")
        Catch myException As Exception
            Console.WriteLine("Exception: " + myException.ToString())
        End Try
    End Sub    
    
    Public Shared Sub PrintValues(myList As IEnumerable)
        Dim obj As [Object]
        For Each obj In  myList
            Console.Write("   {0}", obj)
        Next obj
        Console.WriteLine()
    End Sub 'PrintValues

End Class

' This code produces the following output.
' 
' The ArrayList initially contains the following:
'     The    fox    jumps    over    the    dog
' The Queue initially contains the following:
'     quick    brown
' After adding the Queue, the ArrayList now contains:
'     The    quick    brown    fox    jumps    over    the    dog
' After adding "lazy", the ArrayList now contains:
'     The    quick    brown    fox    jumps    over    the    lazy    dog
' After adding "!!!", the ArrayList now contains:
'     The    quick    brown    fox    jumps    over    the    lazy    dog    !!!
' Exception: System.ArgumentOutOfRangeException: Insertion index was out of range.  Must be non-negative and less than or equal to size.
' Parameter name: index
'    at System.Collections.ArrayList.Insert(Int32 index, Object value)
'    at SamplesArrayList.Main()

using System;
using System.Collections;
public class SamplesArrayList  {

   public static void Main()  {

      // Creates and initializes a new ArrayList using Insert instead of Add.
      ArrayList myAL = new ArrayList();
      myAL.Insert( 0, "The" );
      myAL.Insert( 1, "fox" );
      myAL.Insert( 2, "jumps" );
      myAL.Insert( 3, "over" );
      myAL.Insert( 4, "the" );
      myAL.Insert( 5, "dog" );

      // Creates and initializes a new Queue.
      Queue myQueue = new Queue();
      myQueue.Enqueue( "quick" );
      myQueue.Enqueue( "brown" );

      // Displays the ArrayList and the Queue.
      Console.WriteLine( "The ArrayList initially contains the following:" );
      PrintValues( myAL );
      Console.WriteLine( "The Queue initially contains the following:" );
      PrintValues( myQueue );

      // Copies the Queue elements to the ArrayList at index 1.
      myAL.InsertRange( 1, myQueue );

      // Displays the ArrayList.
      Console.WriteLine( "After adding the Queue, the ArrayList now contains:" );
      PrintValues( myAL );

      // Search for "dog" and add "lazy" before it.
      myAL.Insert( myAL.IndexOf( "dog" ), "lazy" );

      // Displays the ArrayList.
      Console.WriteLine( "After adding \"lazy\", the ArrayList now contains:" );
      PrintValues( myAL );

      // Add "!!!" at the end.
      myAL.Insert( myAL.Count, "!!!" );

      // Displays the ArrayList.
      Console.WriteLine( "After adding \"!!!\", the ArrayList now contains:" );
      PrintValues( myAL );

      // Inserting an element beyond Count throws an exception.
      try  {
         myAL.Insert( myAL.Count+1, "anystring" );
      } catch ( Exception myException )  {
         Console.WriteLine("Exception: " + myException.ToString());
      }
   }

   public static void PrintValues( IEnumerable myList )  {
      foreach ( Object obj in myList )
         Console.Write( "   {0}", obj );
      Console.WriteLine();
   }

}
/* 
This code produces the following output.

The ArrayList initially contains the following:
   The   fox   jumps   over   the   dog
The Queue initially contains the following:
   quick   brown
After adding the Queue, the ArrayList now contains:
   The   quick   brown   fox   jumps   over   the   dog
After adding "lazy", the ArrayList now contains:
   The   quick   brown   fox   jumps   over   the   lazy   dog
After adding "!!!", the ArrayList now contains:
   The   quick   brown   fox   jumps   over   the   lazy   dog   !!!
Exception: System.ArgumentOutOfRangeException: Insertion index was out of range.  Must be non-negative and less than or equal to size.
Parameter name: index
   at System.Collections.ArrayList.Insert(Int32 index, Object value)
   at SamplesArrayList.Main()
*/

using namespace System;
using namespace System::Collections;
void PrintValues( IEnumerable^ myList );
int main()
{
   
   // Creates and initializes a new ArrayList using Insert instead of Add.
   ArrayList^ myAL = gcnew ArrayList;
   myAL->Insert( 0, "The" );
   myAL->Insert( 1, "fox" );
   myAL->Insert( 2, "jumps" );
   myAL->Insert( 3, "over" );
   myAL->Insert( 4, "the" );
   myAL->Insert( 5, "dog" );
   
   // Creates and initializes a new Queue.
   Queue^ myQueue = gcnew Queue;
   myQueue->Enqueue( "quick" );
   myQueue->Enqueue( "brown" );
   
   // Displays the ArrayList and the Queue.
   Console::WriteLine( "The ArrayList initially contains the following:" );
   PrintValues( myAL );
   Console::WriteLine( "The Queue initially contains the following:" );
   PrintValues( myQueue );
   
   // Copies the Queue elements to the ArrayList at index 1.
   myAL->InsertRange( 1, myQueue );
   
   // Displays the ArrayList.
   Console::WriteLine( "After adding the Queue, the ArrayList now contains:" );
   PrintValues( myAL );
   
   // Search for "dog" and add "lazy" before it.
   myAL->Insert( myAL->IndexOf( "dog" ), "lazy" );
   
   // Displays the ArrayList.
   Console::WriteLine( "After adding \"lazy\", the ArrayList now contains:" );
   PrintValues( myAL );
   
   // Add "!!!" at the end.
   myAL->Insert( myAL->Count, "!!!" );
   
   // Displays the ArrayList.
   Console::WriteLine( "After adding \"!!!\", the ArrayList now contains:" );
   PrintValues( myAL );
   
   // Inserting an element beyond Count throws an exception.
   try
   {
      myAL->Insert( myAL->Count + 1, "anystring" );
   }
   catch ( Exception^ myException ) 
   {
      Console::WriteLine( "Exception: {0}", myException );
   }

}

void PrintValues( IEnumerable^ myList )
{
   IEnumerator^ myEnum = myList->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Object^ obj = safe_cast<Object^>(myEnum->Current);
      Console::Write( "   {0}", obj );
   }

   Console::WriteLine();
}

/* 
 This code produces the following output.
 
 The ArrayList initially contains the following:
    The   fox   jumps   over   the   dog
 The Queue initially contains the following:
    quick   brown
 After adding the Queue, the ArrayList now contains:
    The   quick   brown   fox   jumps   over   the   dog
 After adding "lazy", the ArrayList now contains:
    The   quick   brown   fox   jumps   over   the   lazy   dog
 After adding "!!!", the ArrayList now contains:
    The   quick   brown   fox   jumps   over   the   lazy   dog   !!!
 Exception: System.ArgumentOutOfRangeException: Insertion index was out of range.  Must be non-negative and less than or equal to size.
 Parameter name: index
    at System.Collections.ArrayList.Insert(Int32 index, Object value)
    at SamplesArrayList.Main()
 */

import System.*;
import System.Collections.*;

public class SamplesArrayList
{
    public static void main(String[] args)
    {
        // Creates and initializes a new ArrayList using Insert instead of Add.
        ArrayList myAL = new ArrayList();

        myAL.Insert(0, "The");
        myAL.Insert(1, "fox");
        myAL.Insert(2, "jumps");
        myAL.Insert(3, "over");
        myAL.Insert(4, "the");
        myAL.Insert(5, "dog");

        // Creates and initializes a new Queue.
        Queue myQueue = new Queue();

        myQueue.Enqueue("quick");
        myQueue.Enqueue("brown");

        // Displays the ArrayList and the Queue.
        Console.WriteLine("The ArrayList initially contains the following:");
        PrintValues(myAL);
        Console.WriteLine("The Queue initially contains the following:");
        PrintValues(myQueue);

        // Copies the Queue elements to the ArrayList at index 1.
        myAL.InsertRange(1, myQueue);

        // Displays the ArrayList.
        Console.WriteLine("After adding the Queue, the ArrayList now contains:");
        PrintValues(myAL);

        // Search for "dog" and add "lazy" before it.
        myAL.Insert(myAL.IndexOf("dog"), "lazy");

        // Displays the ArrayList.
        Console.WriteLine("After adding \"lazy\", the ArrayList now contains:");
        PrintValues(myAL);

        // Add "!!!" at the end.
        myAL.Insert(myAL.get_Count(), "!!!");

        // Displays the ArrayList.
        Console.WriteLine("After adding \"!!!\", the ArrayList now contains:");
        PrintValues(myAL);

        // Inserting an element beyond Count throws an exception.
        try {
            myAL.Insert(myAL.get_Count() + 1, "anystring");
        }
        catch (System.Exception myException) {
            Console.WriteLine("Exception: " + myException.ToString());
        }
    } //main

    public static void PrintValues(IEnumerable myList)
    {
        IEnumerator objMyEnum = myList.GetEnumerator();
        while (objMyEnum.MoveNext()) {
            Object obj = objMyEnum.get_Current();
            Console.Write("   {0}", obj);
        }
        Console.WriteLine();
    } //PrintValues
} //SamplesArrayList 
/* 
 This code produces the following output.
 
 The ArrayList initially contains the following:
    The   fox   jumps   over   the   dog
 The Queue initially contains the following:
    quick   brown
 After adding the Queue, the ArrayList now contains:
    The   quick   brown   fox   jumps   over   the   dog
 After adding "lazy", the ArrayList now contains:
    The   quick   brown   fox   jumps   over   the   lazy   dog
 After adding "!!!", the ArrayList now contains:
    The   quick   brown   fox   jumps   over   the   lazy   dog   !!!
 Exception: System.ArgumentOutOfRangeException: Insertion index was out of range.  
 Must be non-negative and less than or equal to size.
 Parameter name: index
    at System.Collections.ArrayList.Insert(Int32 index, Object value)
    at SamplesArrayList.main(String[] args)
 */

import System;
import System.Collections;


// Creates and initializes a new ArrayList using Insert instead of Add.
var myAL : ArrayList = new ArrayList();
myAL.Insert( 0, "The" );
myAL.Insert( 1, "fox" );
myAL.Insert( 2, "jumped" );
myAL.Insert( 3, "over" );
myAL.Insert( 4, "the" );
myAL.Insert( 5, "dog" );

// Creates and initializes a new Queue.
var myQueue : Queue = new Queue();
myQueue.Enqueue( "quick" );
myQueue.Enqueue( "brown" );

// Displays the ArrayList and the Queue.
Console.WriteLine( "The ArrayList initially contains the following:" );
PrintValues( myAL );
Console.WriteLine( "The Queue initially contains the following:" );
PrintValues( myQueue );

// Copies the Queue elements to the ArrayList at index 1.
myAL.InsertRange( 1, myQueue );

// Displays the ArrayList.
Console.WriteLine( "After adding the Queue, the ArrayList now contains:" );
PrintValues( myAL );

// Search for "dog" and add "lazy" before it.
myAL.Insert( myAL.IndexOf( "dog" ), "lazy" );

// Displays the ArrayList.
Console.WriteLine( "After adding \"lazy\", the ArrayList now contains:" );
PrintValues( myAL );

// Add "!!!" at the end.
myAL.Insert( myAL.Count, "!!!" );

// Displays the ArrayList.
Console.WriteLine( "After adding \"!!!\", the ArrayList now contains:" );
PrintValues( myAL );

// Inserting an element beyond Count throws an exception.
try  {
  myAL.Insert( myAL.Count+1, "anystring" );
} catch ( myException : Exception )  {
  Console.WriteLine("Exception: " + myException.ToString());
}


 
function PrintValues( myList : IEnumerable)  {
   var  myEnumerator : System.Collections.IEnumerator = myList.GetEnumerator();
   while ( myEnumerator.MoveNext() )
      Console.Write( "\t{0}", myEnumerator.Current );
   Console.WriteLine();
}
 /* 
 This code produces the following output.
 
 The ArrayList initially contains the following:
    The fox jumped  over    the dog
 The Queue initially contains the following:
    quick   brown
 After adding the Queue, the ArrayList now contains:
    The quick   brown   fox jumped  over    the dog
 After adding "lazy", the ArrayList now contains:
    The quick   brown   fox jumped  over    the lazy    dog
 After adding "!!!", the ArrayList now contains:
    The quick   brown   fox jumped  over    the lazy    dog !!!
 Exception: System.ArgumentOutOfRangeException: Insertion index was out of range.  Must be non-negative and less than or equal to size.
 Parameter name: index
    at System.Collections.ArrayList.Insert(Int32 index, Object value)
    at JScript 0.Global Code()
 */

플랫폼

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework에서 모든 플래폼의 모든 버전을 지원하지는 않습니다. 지원되는 버전의 목록은 시스템 요구 사항을 참조하십시오.

버전 정보

.NET Framework

2.0, 1.1, 1.0에서 지원

.NET Compact Framework

2.0, 1.0에서 지원

참고 항목

참조

ArrayList 클래스
ArrayList 멤버
System.Collections 네임스페이스
InsertRange
Add
Remove

다음을 통해 공유