C＃|如何获取字符串的HashCode

GetHashCode()方法用于获取指定字符串的哈希码。当您将此方法应用于字符串，此方法将返回给定字符串的32位带符号整数哈希码。

句法：

public override int GetHashCode ();

返回值：该方法的返回类型为System.Int32 。此方法返回32位有符号整数哈希码。

下面给出了一些示例，以更好地理解实现：

范例1：

// C# program to illustrate 
// the GetHashCode() method
using System;
  
public class GFG {
      
    // main method
    static public void Main()
    {
        int s1, s2, s3;
          
        // strings
        string a1 = "abc";
        string a2 = "geeks";
        string a3 = "gfg";
  
        // Get hash code of the given string by
        // using GetHashCode() method
        s1 = a1.GetHashCode();
        s2 = a2.GetHashCode();
        s3 = a3.GetHashCode();
  
        // display strings and their hash code
        Console.WriteLine("Display strings");
        Console.WriteLine("string 1: {0} and hashcode: {1}", a1, s1);
        Console.WriteLine("string 2: {0} and hashcode: {1}", a2, s2);
        Console.WriteLine("string 3: {0} and hashcode: {1}", a3, s3);
    }
}

输出：

Display strings
string 1: abc and hashcode: 1099313834
string 2: geeks and hashcode: -1893508949
string 3: gfg and hashcode: -870054572

范例2：

// C# program to illustrate
// the GetHashCode() method
using System;
  
class GFG {
      
    // main method
    static public void Main()
    {
  
        // calling Hashcode method
        Hashcode("Hello");
        Hashcode("GFG");
        Hashcode("Geeks");
        Hashcode("Geeksforgeeks");
        Hashcode("C#");
        Hashcode("Tutorial");
    }
  
    // Hashcode method
    public static void Hashcode(String value)
    {
        int result;
  
        // get hash code of the entered strings
        result = value.GetHashCode();
        Console.WriteLine("String : {0} and HashCode: {1}", value, result);
    }
}

输出：

String : Hello and HashCode: -327378614
String : GFG and HashCode: 1999992308
String : Geeks and HashCode: -1893476149
String : Geeksforgeeks and HashCode: -2133923457
String : C# and HashCode: -1917577788
String : Tutorial and HashCode: 1463624248

参考：

• https://docs.microsoft.com/zh-cn/dotnet/api/system。字符串.gethashcode?view = netframework-4.7.2＃definition