UTF8Encoding.GetHashCode メソッドとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

UTF8Encoding.GetHashCode メソッド

現在のインスタンスのハッシュコードを返します。

名前空間: System.Text
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

Public Overrides Function
 GetHashCode As Integer

Visual Basic (使用法)

Dim instance As UTF8Encoding
Dim returnValue As Integer

returnValue = instance.GetHashCode

public override int GetHashCode ()

C++

public:
virtual int GetHashCode () override

public int GetHashCode ()

JScript

public override function GetHashCode () : int

戻り値
現在のインスタンスのハッシュコード。

使用例

次の例は、GetHashCode メソッドを使用して UTF8Encoding のインスタンスのハッシュコードを返す方法を示しています。このメソッドで返されるハッシュコードは、UTF8Encoding を作成するときに使用したコンストラクタによって異なります。

Visual Basic

Imports System
Imports System.Text

Class UTF8EncodingExample
    
    Public Shared Sub Main()
        ' Many ways to instantiate a UTF8 encoding.
        Dim UTF8a As New
 UTF8Encoding()
        Dim UTF8b As Encoding = Encoding.UTF8
        Dim UTF8c = New UTF8Encoding(True,
 True)
        Dim UTF8d = New UTF8Encoding(False,
 False)
        
        ' But not all are the same.
        Console.WriteLine(UTF8a.GetHashCode())
        Console.WriteLine(UTF8b.GetHashCode())
        Console.WriteLine(UTF8c.GetHashCode())
        Console.WriteLine(UTF8d.GetHashCode())
    End Sub 'Main
End Class 'UTF8EncodingExample

using System;
using System.Text;

class UTF8EncodingExample {
    public static void Main()
 {
        // Many ways to instantiate a UTF8 encoding.
        UTF8Encoding UTF8a = new UTF8Encoding();
        Encoding UTF8b = Encoding.UTF8;
        Encoding UTF8c = new UTF8Encoding(true,
 true);
        Encoding UTF8d = new UTF8Encoding(false,
 false);

        // But not all are the same.
        Console.WriteLine(UTF8a.GetHashCode());
        Console.WriteLine(UTF8b.GetHashCode());
        Console.WriteLine(UTF8c.GetHashCode());
        Console.WriteLine(UTF8d.GetHashCode());
    }
}

C++

using namespace System;
using namespace System::Text;
int main()
{
   
   // Many ways to instantiate a UTF8 encoding.
   UTF8Encoding^ UTF8a = gcnew UTF8Encoding;
   Encoding^ UTF8b = Encoding::UTF8;
   Encoding^ UTF8c = gcnew UTF8Encoding( true,true
 );
   Encoding^ UTF8d = gcnew UTF8Encoding( false,false
 );
   
   // But not all are the same.
   Console::WriteLine( UTF8a->GetHashCode() );
   Console::WriteLine( UTF8b->GetHashCode() );
   Console::WriteLine( UTF8c->GetHashCode() );
   Console::WriteLine( UTF8d->GetHashCode() );
}

import System.*;
import System.Text.*;

class UTF8EncodingExample
{
    public static void main(String[]
 args)
    {
        // Many ways to instantiate a UTF8 encoding.
        UTF8Encoding utf8A = new UTF8Encoding();
        Encoding utf8B = Encoding.get_UTF8();
        Encoding utf8C = new UTF8Encoding(true,
 true);
        Encoding utf8D = new UTF8Encoding(false,
 false);

        // But not all are the same.
        Console.WriteLine(utf8A.GetHashCode());
        Console.WriteLine(utf8B.GetHashCode());
        Console.WriteLine(utf8C.GetHashCode());
        Console.WriteLine(utf8D.GetHashCode());
    } //main
} //UTF8EncodingExample