ArrayList.FixedSize メソッド

定義

固定サイズのリスト ラッパーを返します。要素を変更することはできますが、追加や削除はできません。Returns a list wrapper with a fixed size, where elements are allowed to be modified, but not added or removed.

オーバーロード

FixedSize(ArrayList)

固定サイズの ArrayList ラッパーを返します。Returns an ArrayList wrapper with a fixed size.

FixedSize(IList)

固定サイズの IList ラッパーを返します。Returns an IList wrapper with a fixed size.

FixedSize(ArrayList)

固定サイズの ArrayList ラッパーを返します。Returns an ArrayList wrapper with a fixed size.

public:
 static System::Collections::ArrayList ^ FixedSize(System::Collections::ArrayList ^ list);
public static System.Collections.ArrayList FixedSize (System.Collections.ArrayList list);
static member FixedSize : System.Collections.ArrayList -> System.Collections.ArrayList
Public Shared Function FixedSize (list As ArrayList) As ArrayList

パラメーター

list
ArrayList

ラップする ArrayListThe ArrayList to wrap.

戻り値

ArrayList

固定サイズの ArrayList ラッパー。An ArrayList wrapper with a fixed size.

例外

listnullです。list is null.

を囲む固定サイズのラッパーを作成する方法を次のコード例に示し ArrayList ます。The following code example shows how to create a fixed-size wrapper around an ArrayList.

using namespace System;
using namespace System::Collections;
void PrintValues( IEnumerable^ myList, char mySeparator );
int main()
{
   
   // Creates and initializes a new ArrayList.
   ArrayList^ myAL = gcnew ArrayList;
   myAL->Add( "The" );
   myAL->Add( "quick" );
   myAL->Add( "brown" );
   myAL->Add( "fox" );
   myAL->Add( "jumps" );
   myAL->Add( "over" );
   myAL->Add( "the" );
   myAL->Add( "lazy" );
   myAL->Add( "dog" );
   
   // Create a fixed-size wrapper around the ArrayList.
   ArrayList^ myFixedSizeAL = ArrayList::FixedSize( myAL );
   
   // Display whether the ArrayLists have a fixed size or not.
   Console::WriteLine( "myAL {0}.", myAL->IsFixedSize ? (String^)"has a fixed size" : "does not have a fixed size" );
   Console::WriteLine( "myFixedSizeAL {0}.", myFixedSizeAL->IsFixedSize ? (String^)"has a fixed size" : "does not have a fixed size" );
   Console::WriteLine();
   
   // Display both ArrayLists.
   Console::WriteLine( "Initially," );
   Console::Write( "Standard  :" );
   PrintValues( myAL, ' ' );
   Console::Write( "Fixed size:" );
   PrintValues( myFixedSizeAL, ' ' );
   
   // Sort is allowed in the fixed-size ArrayList.
   myFixedSizeAL->Sort();
   
   // Display both ArrayLists.
   Console::WriteLine( "After Sort," );
   Console::Write( "Standard  :" );
   PrintValues( myAL, ' ' );
   Console::Write( "Fixed size:" );
   PrintValues( myFixedSizeAL, ' ' );
   
   // Reverse is allowed in the fixed-size ArrayList.
   myFixedSizeAL->Reverse();
   
   // Display both ArrayLists.
   Console::WriteLine( "After Reverse," );
   Console::Write( "Standard  :" );
   PrintValues( myAL, ' ' );
   Console::Write( "Fixed size:" );
   PrintValues( myFixedSizeAL, ' ' );
   
   // Add an element to the standard ArrayList.
   myAL->Add( "AddMe" );
   
   // Display both ArrayLists.
   Console::WriteLine( "After adding to the standard ArrayList," );
   Console::Write( "Standard  :" );
   PrintValues( myAL, ' ' );
   Console::Write( "Fixed size:" );
   PrintValues( myFixedSizeAL, ' ' );
   Console::WriteLine();
   
   // Adding or inserting elements to the fixed-size ArrayList throws an exception.
   try
   {
      myFixedSizeAL->Add( "AddMe2" );
   }
   catch ( Exception^ myException ) 
   {
      Console::WriteLine( "Exception: {0}", myException );
   }

   try
   {
      myFixedSizeAL->Insert( 3, "InsertMe" );
   }
   catch ( Exception^ myException ) 
   {
      Console::WriteLine( "Exception: {0}", myException );
   }

}

void PrintValues( IEnumerable^ myList, char mySeparator )
{
   IEnumerator^ myEnum = myList->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Object^ obj = safe_cast<Object^>(myEnum->Current);
      Console::Write( "{0}{1}", mySeparator, obj );
   }

   Console::WriteLine();
}

/*
 This code produces the following output.
 
 myAL does not have a fixed size.
 myFixedSizeAL has a fixed size.

 Initially,
 Standard  : The quick brown fox jumps over the lazy dog
 Fixed size: The quick brown fox jumps over the lazy dog
 After Sort,
 Standard  : brown dog fox jumps lazy over quick the The
 Fixed size: brown dog fox jumps lazy over quick the The
 After Reverse,
 Standard  : The the quick over lazy jumps fox dog brown
 Fixed size: The the quick over lazy jumps fox dog brown
 After adding to the standard ArrayList,
 Standard  : The the quick over lazy jumps fox dog brown AddMe
 Fixed size: The the quick over lazy jumps fox dog brown AddMe

 Exception: System.NotSupportedException: Collection was of a fixed size.
    at System.Collections.FixedSizeArrayList.Add(Object obj)
    at SamplesArrayList.Main()
 Exception: System.NotSupportedException: Collection was of a fixed size.
    at System.Collections.FixedSizeArrayList.Insert(Int32 index, Object obj)
    at SamplesArrayList.Main()

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

   public static void Main()  {

      // Creates and initializes a new ArrayList.
      ArrayList myAL = new ArrayList();
      myAL.Add( "The" );
      myAL.Add( "quick" );
      myAL.Add( "brown" );
      myAL.Add( "fox" );
      myAL.Add( "jumps" );
      myAL.Add( "over" );
      myAL.Add( "the" );
      myAL.Add( "lazy" );
      myAL.Add( "dog" );

      // Create a fixed-size wrapper around the ArrayList.
      ArrayList myFixedSizeAL = ArrayList.FixedSize( myAL );

      // Display whether the ArrayLists have a fixed size or not.
      Console.WriteLine( "myAL {0}.", myAL.IsFixedSize ? "has a fixed size" : "does not have a fixed size" );
      Console.WriteLine( "myFixedSizeAL {0}.", myFixedSizeAL.IsFixedSize ? "has a fixed size" : "does not have a fixed size" );
      Console.WriteLine();

      // Display both ArrayLists.
      Console.WriteLine( "Initially," );
      Console.Write( "Standard  :" );
      PrintValues( myAL, ' ' );
      Console.Write( "Fixed size:" );
      PrintValues( myFixedSizeAL, ' ' );

      // Sort is allowed in the fixed-size ArrayList.
      myFixedSizeAL.Sort();

      // Display both ArrayLists.
      Console.WriteLine( "After Sort," );
      Console.Write( "Standard  :" );
      PrintValues( myAL, ' ' );
      Console.Write( "Fixed size:" );
      PrintValues( myFixedSizeAL, ' ' );

      // Reverse is allowed in the fixed-size ArrayList.
      myFixedSizeAL.Reverse();

      // Display both ArrayLists.
      Console.WriteLine( "After Reverse," );
      Console.Write( "Standard  :" );
      PrintValues( myAL, ' ' );
      Console.Write( "Fixed size:" );
      PrintValues( myFixedSizeAL, ' ' );

      // Add an element to the standard ArrayList.
      myAL.Add( "AddMe" );

      // Display both ArrayLists.
      Console.WriteLine( "After adding to the standard ArrayList," );
      Console.Write( "Standard  :" );
      PrintValues( myAL, ' ' );
      Console.Write( "Fixed size:" );
      PrintValues( myFixedSizeAL, ' ' );
      Console.WriteLine();

      // Adding or inserting elements to the fixed-size ArrayList throws an exception.
      try  {
         myFixedSizeAL.Add( "AddMe2" );
      } catch ( Exception myException )  {
         Console.WriteLine("Exception: " + myException.ToString());
      }
      try  {
         myFixedSizeAL.Insert( 3, "InsertMe" );
      } catch ( Exception myException )  {
         Console.WriteLine("Exception: " + myException.ToString());
      }
   }

   public static void PrintValues( IEnumerable myList, char mySeparator )  {
      foreach ( Object obj in myList )
         Console.Write( "{0}{1}", mySeparator, obj );
      Console.WriteLine();
   }
}
/*
This code produces the following output.

myAL does not have a fixed size.
myFixedSizeAL has a fixed size.

Initially,
Standard  : The quick brown fox jumps over the lazy dog
Fixed size: The quick brown fox jumps over the lazy dog
After Sort,
Standard  : brown dog fox jumps lazy over quick the The
Fixed size: brown dog fox jumps lazy over quick the The
After Reverse,
Standard  : The the quick over lazy jumps fox dog brown
Fixed size: The the quick over lazy jumps fox dog brown
After adding to the standard ArrayList,
Standard  : The the quick over lazy jumps fox dog brown AddMe
Fixed size: The the quick over lazy jumps fox dog brown AddMe

Exception: System.NotSupportedException: Collection was of a fixed size.
   at System.Collections.FixedSizeArrayList.Add(Object obj)
   at SamplesArrayList.Main()
Exception: System.NotSupportedException: Collection was of a fixed size.
   at System.Collections.FixedSizeArrayList.Insert(Int32 index, Object obj)
   at SamplesArrayList.Main()

*/
Imports System.Collections

Public Class SamplesArrayList    
    
    Public Shared Sub Main()
        
        ' Creates and initializes a new ArrayList.
        Dim myAL As New ArrayList()
        myAL.Add("The")
        myAL.Add("quick")
        myAL.Add("brown")
        myAL.Add("fox")
        myAL.Add("jumps")
        myAL.Add("over")
        myAL.Add("the")
        myAL.Add("lazy")
        myAL.Add("dog")
        
        ' Create a fixed-size wrapper around the ArrayList.
        Dim myFixedSizeAL As ArrayList = ArrayList.FixedSize(myAL)
        
        ' Display whether the ArrayLists have a fixed size or not.
        Dim msg As String
        If myAL.IsFixedSize Then
            msg = "has a fixed size"
        Else
            msg = "does not have a fixed size"
        End If
        Console.WriteLine("myAL {0}.", msg)
        If myFixedSizeAL.IsFixedSize Then
            msg = "has a fixed size"
        Else
            msg = "does not have a fixed size"
        End If
        Console.WriteLine("myFixedSizeAL {0}.", msg)
        Console.WriteLine()
        
        ' Display both ArrayLists.
        Console.WriteLine("Initially,")
        Console.Write("Standard  :")
        PrintValues(myAL, " "c)
        Console.Write("Fixed size:")
        PrintValues(myFixedSizeAL, " "c)
        
        ' Sort is allowed in the fixed-size ArrayList.
        myFixedSizeAL.Sort()
        
        ' Display both ArrayLists.
        Console.WriteLine("After Sort,")
        Console.Write("Standard  :")
        PrintValues(myAL, " "c)
        Console.Write("Fixed size:")
        PrintValues(myFixedSizeAL, " "c)
        
        ' Reverse is allowed in the fixed-size ArrayList.
        myFixedSizeAL.Reverse()
        
        ' Display both ArrayLists.
        Console.WriteLine("After Reverse,")
        Console.Write("Standard  :")
        PrintValues(myAL, " "c)
        Console.Write("Fixed size:")
        PrintValues(myFixedSizeAL, " "c)
        
        ' Add an element to the standard ArrayList.
        myAL.Add("AddMe")
        
        ' Display both ArrayLists.
        Console.WriteLine("After adding to the standard ArrayList,")
        Console.Write("Standard  :")
        PrintValues(myAL, " "c)
        Console.Write("Fixed size:")
        PrintValues(myFixedSizeAL, " "c)
        Console.WriteLine()
        
        ' Adding or inserting elements to the fixed-size ArrayList throws an exception.
        Try
            myFixedSizeAL.Add("AddMe2")
        Catch myException As Exception
            Console.WriteLine("Exception: " + myException.ToString())
        End Try
        Try
            myFixedSizeAL.Insert(3, "InsertMe")
        Catch myException As Exception
            Console.WriteLine("Exception: " + myException.ToString())
        End Try
    End Sub

    Public Shared Sub PrintValues(myList As IEnumerable, mySeparator As Char)
        Dim obj As [Object]
        For Each obj In  myList
            Console.Write("{0}{1}", mySeparator, obj)
        Next obj
        Console.WriteLine()
    End Sub

End Class


' This code produces the following output.
' 
' myAL does not have a fixed size.
' myFixedSizeAL has a fixed size.
' 
' Initially,
' Standard  : The quick brown fox jumps over the lazy dog
' Fixed size: The quick brown fox jumps over the lazy dog
' After Sort,
' Standard  : brown dog fox jumps lazy over quick the The
' Fixed size: brown dog fox jumps lazy over quick the The
' After Reverse,
' Standard  : The the quick over lazy jumps fox dog brown
' Fixed size: The the quick over lazy jumps fox dog brown
' After adding to the standard ArrayList,
' Standard  : The the quick over lazy jumps fox dog brown AddMe
' Fixed size: The the quick over lazy jumps fox dog brown AddMe
' 
' Exception: System.NotSupportedException: Collection was of a fixed size.
'    at System.Collections.FixedSizeArrayList.Add(Object obj)
'    at SamplesArrayList.Main()
' Exception: System.NotSupportedException: Collection was of a fixed size.
'    at System.Collections.FixedSizeArrayList.Insert(Int32 index, Object obj)
'    at SamplesArrayList.Main()

注釈

このラッパーを使用して、元のに対する追加および削除を防ぐことができ ArrayList ます。This wrapper can be used to prevent additions to and deletions from the original ArrayList. これらの要素は、引き続き変更または置換できます。The elements can still be modified or replaced.

固定サイズのコレクションは、要素の追加と削除を防ぐラッパーを持つ単純なコレクションです。したがって、要素の追加や削除など、基になるコレクションに変更が加えられた場合、固定サイズのコレクションにはこれらの変更が反映されます。A collection with a fixed size is simply a collection with a wrapper that prevents adding and removing elements; therefore, if changes are made to the underlying collection, including the addition or removal of elements, the fixed-size collection reflects those changes.

このメソッドは、 O(1) 操作です。This method is an O(1) operation.

適用対象

FixedSize(IList)

固定サイズの IList ラッパーを返します。Returns an IList wrapper with a fixed size.

public:
 static System::Collections::IList ^ FixedSize(System::Collections::IList ^ list);
public static System.Collections.IList FixedSize (System.Collections.IList list);
static member FixedSize : System.Collections.IList -> System.Collections.IList
Public Shared Function FixedSize (list As IList) As IList

パラメーター

list
IList

ラップする IListThe IList to wrap.

戻り値

IList

固定サイズの IList ラッパー。An IList wrapper with a fixed size.

例外

listnullです。list is null.

注釈

このラッパーを使用して、元のに対する追加および削除を防ぐことができ IList ます。This wrapper can be used to prevent additions to and deletions from the original IList. これらの要素は、引き続き変更または置換できます。The elements can still be modified or replaced.

固定サイズのコレクションは、要素の追加と削除を防ぐラッパーを持つ単純なコレクションです。したがって、要素の追加や削除など、基になるコレクションに変更が加えられた場合、固定サイズのコレクションにはこれらの変更が反映されます。A collection with a fixed size is simply a collection with a wrapper that prevents adding and removing elements; therefore, if changes are made to the underlying collection, including the addition or removal of elements, the fixed-size collection reflects those changes.

このメソッドは、 O(1) 操作です。This method is an O(1) operation.

適用対象