String.GetHashCode-Methode
Gibt den Hashcode für diese Zeichenfolge zurück.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Overrides Function GetHashCode As Integer
'Usage
Dim instance As String
Dim returnValue As Integer
returnValue = instance.GetHashCode
public override int GetHashCode ()
public:
virtual int GetHashCode () override
public int GetHashCode ()
public override function GetHashCode () : int
Rückgabewert
Ein 32-Bit-Ganzzahl-Hashcode mit Vorzeichen.
Hinweise
Das Verhalten von GetHashCode ist von seiner Implementierung abhängig, die für verschiedene Versionen der Common Language Runtime unterschiedlich sein kann. Ein Grund hierfür ist die Verbesserung der Leistung von GetHashCode. Wenn für GetHashCode ein konstantes Verhalten erforderlich ist, überschreiben Sie die Implementierung der Runtime von GetHashCode mit einer eigenen Implementierung, die immer konstant bleibt.
Beispiel
Im folgenden Codebeispiel wird die Verwendung der GetHashCode-Methode mit verschiedenen Eingabezeichenfolgen veranschaulicht.
' Example for the String.GetHashCode( ) method.
Imports System
Imports Microsoft.VisualBasic
Module GetHashCode
Sub Main()
Console.WriteLine( _
"This example of String.GetHashCode( ) " & _
"generates the following output." & vbCrLf)
DisplayHashCode("")
DisplayHashCode("a")
DisplayHashCode("ab")
DisplayHashCode("abc")
DisplayHashCode("abd")
DisplayHashCode("abe")
DisplayHashCode("abcdef")
DisplayHashCode("abcdeg")
DisplayHashCode("abcdeh")
DisplayHashCode("abcdei")
DisplayHashCode("Abcdeg")
DisplayHashCode("Abcdeh")
DisplayHashCode("Abcdei")
End Sub 'Main
Sub DisplayHashCode(Operand As String)
Dim HashCode As Integer = Operand.GetHashCode()
Console.WriteLine( _
"The hash code for ""{0}"" is: 0x{1:X8}, {1}", _
Operand, HashCode)
End Sub 'DisplayHashCode
End Module 'GetHashCode
' This example of String.GetHashCode( ) generates the following output.
'
' The hash code for "" is: 0x00001505, 5381
' The hash code for "a" is: 0x0002B5C4, 177604
' The hash code for "ab" is: 0x00596E26, 5860902
' The hash code for "abc" is: 0x0B873285, 193409669
' The hash code for "abd" is: 0x0B873282, 193409666
' The hash code for "abe" is: 0x0B873283, 193409667
' The hash code for "abcdef" is: 0x4DDB4BE2, 1306217442
' The hash code for "abcdeg" is: 0x4DDB4BE3, 1306217443
' The hash code for "abcdeh" is: 0x4DDB4BEC, 1306217452
' The hash code for "abcdei" is: 0x4DDB4BED, 1306217453
' The hash code for "Abcdeg" is: 0x941C4FC3, -1810083901
' The hash code for "Abcdeh" is: 0x941C4FCC, -1810083892
' The hash code for "Abcdei" is: 0x941C4FCD, -1810083891
// Example for the String.GetHashCode( ) method.
using System;
class GetHashCode
{
public static void Main()
{
Console.WriteLine(
"This example of String.GetHashCode( ) " +
"generates the following output.\n" );
DisplayHashCode( "" );
DisplayHashCode( "a" );
DisplayHashCode( "ab" );
DisplayHashCode( "abc" );
DisplayHashCode( "abd" );
DisplayHashCode( "abe" );
DisplayHashCode( "abcdef" );
DisplayHashCode( "abcdeg" );
DisplayHashCode( "abcdeh" );
DisplayHashCode( "abcdei" );
DisplayHashCode( "Abcdeg" );
DisplayHashCode( "Abcdeh" );
DisplayHashCode( "Abcdei" );
}
static void DisplayHashCode( String Operand )
{
int HashCode = Operand.GetHashCode( );
Console.WriteLine(
"The hash code for \"{0}\" is: 0x{1:X8}, {1}",
Operand, HashCode );
}
}
/*
This example of String.GetHashCode( ) generates the following output.
The hash code for "" is: 0x00001505, 5381
The hash code for "a" is: 0x0002B5C4, 177604
The hash code for "ab" is: 0x00596E26, 5860902
The hash code for "abc" is: 0x0B873285, 193409669
The hash code for "abd" is: 0x0B873282, 193409666
The hash code for "abe" is: 0x0B873283, 193409667
The hash code for "abcdef" is: 0x4DDB4BE2, 1306217442
The hash code for "abcdeg" is: 0x4DDB4BE3, 1306217443
The hash code for "abcdeh" is: 0x4DDB4BEC, 1306217452
The hash code for "abcdei" is: 0x4DDB4BED, 1306217453
The hash code for "Abcdeg" is: 0x941C4FC3, -1810083901
The hash code for "Abcdeh" is: 0x941C4FCC, -1810083892
The hash code for "Abcdei" is: 0x941C4FCD, -1810083891
*/
// Example for the String::GetHashCode( ) method.
using namespace System;
void DisplayHashCode( String^ Operand )
{
int HashCode = Operand->GetHashCode();
Console::WriteLine( "The hash code for \"{0}\" is: 0x{1:X8}, {1}", Operand, HashCode );
}
int main()
{
Console::WriteLine( "This example of String::GetHashCode( ) "
"generates the following output.\n" );
DisplayHashCode( "" );
DisplayHashCode( "a" );
DisplayHashCode( "ab" );
DisplayHashCode( "abc" );
DisplayHashCode( "abd" );
DisplayHashCode( "abe" );
DisplayHashCode( "abcdef" );
DisplayHashCode( "abcdeg" );
DisplayHashCode( "abcdeh" );
DisplayHashCode( "abcdei" );
DisplayHashCode( "Abcdeg" );
DisplayHashCode( "Abcdeh" );
DisplayHashCode( "Abcdei" );
}
/*
This example of String::GetHashCode( ) generates the following output.
The hash code for "" is: 0x00001505, 5381
The hash code for "a" is: 0x0002B5C4, 177604
The hash code for "ab" is: 0x00596E26, 5860902
The hash code for "abc" is: 0x0B873285, 193409669
The hash code for "abd" is: 0x0B873282, 193409666
The hash code for "abe" is: 0x0B873283, 193409667
The hash code for "abcdef" is: 0x4DDB4BE2, 1306217442
The hash code for "abcdeg" is: 0x4DDB4BE3, 1306217443
The hash code for "abcdeh" is: 0x4DDB4BEC, 1306217452
The hash code for "abcdei" is: 0x4DDB4BED, 1306217453
The hash code for "Abcdeg" is: 0x941C4FC3, -1810083901
The hash code for "Abcdeh" is: 0x941C4FCC, -1810083892
The hash code for "Abcdei" is: 0x941C4FCD, -1810083891
*/
// Example for the String.GetHashCode( ) method.
import System.*;
class GetHashCode
{
public static void main(String[] args)
{
Console.WriteLine(("This example of String.GetHashCode( ) "
+ "generates the following output.\n"));
DisplayHashCode("");
DisplayHashCode("a");
DisplayHashCode("ab");
DisplayHashCode("abc");
DisplayHashCode("abd");
DisplayHashCode("abe");
DisplayHashCode("abcdef");
DisplayHashCode("abcdeg");
DisplayHashCode("abcdeh");
DisplayHashCode("abcdei");
DisplayHashCode("Abcdeg");
DisplayHashCode("Abcdeh");
DisplayHashCode("Abcdei");
} //main
static void DisplayHashCode(String operand)
{
int hashCode = operand.GetHashCode();
Console.WriteLine("The hash code for \"{0}\" is: 0x{1}, {2}",
operand, ((System.Int32)hashCode).ToString("X8"),
((System.Int32)hashCode).ToString(""));
} //DisplayHashCode
} //GetHashCode
/*
This example of String.GetHashCode( ) generates the following output.
The hash code for "" is: 0x00001505, 5381
The hash code for "a" is: 0x0002B5C4, 177604
The hash code for "ab" is: 0x00596E26, 5860902
The hash code for "abc" is: 0x0B873285, 193409669
The hash code for "abd" is: 0x0B873282, 193409666
The hash code for "abe" is: 0x0B873283, 193409667
The hash code for "abcdef" is: 0x4DDB4BE2, 1306217442
The hash code for "abcdeg" is: 0x4DDB4BE3, 1306217443
The hash code for "abcdeh" is: 0x4DDB4BEC, 1306217452
The hash code for "abcdei" is: 0x4DDB4BED, 1306217453
The hash code for "Abcdeg" is: 0x941C4FC3, -1810083901
The hash code for "Abcdeh" is: 0x941C4FCC, -1810083892
The hash code for "Abcdei" is: 0x941C4FCD, -1810083891
*/
Plattformen
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.
Versionsinformationen
.NET Framework
Unterstützt in: 2.0, 1.1, 1.0
.NET Compact Framework
Unterstützt in: 2.0, 1.0