Int32.Equals 方法

  • 参考

定义

命名空间:
System
程序集:
System.Runtime.dll
程序集:
mscorlib.dll
程序集:
netstandard.dll

返回一个值，该值指示此实例是否等于指定的 Int32 值。

重载

Equals(Int32)

返回一个值，该值指示此实例是否等于指定的 Int32 值。
Equals(Object)

返回一个值，该值指示此实例是否等于指定的对象。

Equals(Int32)

Source:
Int32.cs
Source:
Int32.cs
Source:
Int32.cs

返回一个值，该值指示此实例是否等于指定的 Int32 值。

public:
 virtual bool Equals(int obj);
public bool Equals (int obj);
override this.Equals : int -> bool
Public Function Equals (obj As Integer) As Boolean

参数

obj
Int32

要与此实例进行比较的 Int32 值。

返回

Boolean

如果 true 的值与此实例相同，则为 obj；否则为 false。

实现

Equals(T)

注解

此方法实现 System.IEquatable<T> 接口，并且性能略好于 Int32.Equals(Object) ，因为它不必将 参数转换为 obj 对象。

调用方说明

编译器重载解析可能说明两 Equals(Int32) 种方法重载的行为存在明显差异。 如果定义了 参数和 之间的Int32隐式转换obj，并且参数未类型化为 ，Object编译器将执行隐式转换并调用 Equals(Int32) 方法。 否则，它们会调用 Equals(Object) 方法，如果其obj参数不是Int32值，则该方法始终返回 false 。 以下示例演示了两个方法重载之间的行为差异。 对于 、、 和 值，第一个比较返回true是因为编译器自动执行扩大转换并调用 Equals(Int32) 方法，而第二个比较返回false是因为编译器调用 Equals(Object) 方法。UInt16SByteInt16Byte

using System;

public class Example
{
   static int value = 112;

   public static void Main()
   {
      byte byte1= 112;
      Console.WriteLine("value = byte1: {0,15}", value.Equals(byte1));
      TestObjectForEquality(byte1);

      short short1 = 112;
      Console.WriteLine("value = short1: {0,15}", value.Equals(short1));
      TestObjectForEquality(short1);

      long long1 = 112;
      Console.WriteLine("value = long1: {0,17}", value.Equals(long1));
      TestObjectForEquality(long1);

      sbyte sbyte1 = 112;
      Console.WriteLine("value = sbyte1: {0,15}", value.Equals(sbyte1));
      TestObjectForEquality(sbyte1);

      ushort ushort1 = 112;
      Console.WriteLine("value = ushort1: {0,15}", value.Equals(ushort1));
      TestObjectForEquality(ushort1);

      ulong ulong1 = 112;
      Console.WriteLine("value = ulong1: {0,17}", value.Equals(ulong1));
      TestObjectForEquality(ulong1);

      decimal dec1 = 112m;
      Console.WriteLine("value = dec1: {0,20}", value.Equals(dec1));
      TestObjectForEquality(dec1);

      double dbl1 = 112;
      Console.WriteLine("value = dbl1: {0,19}", value.Equals(dbl1));
      TestObjectForEquality(dbl1);
   }

   private static void TestObjectForEquality(Object obj)
   {
      Console.WriteLine("{0} ({1}) = {2} ({3}): {4}\n",
                        value, value.GetType().Name,
                        obj, obj.GetType().Name,
                        value.Equals(obj));
   }
}
// The example displays the following output:
//       value = byte1:            True
//       112 (Int32) = 112 (Byte): False
//
//       value = short1:            True
//       112 (Int32) = 112 (Int16): False
//
//       value = long1:             False
//       112 (Int32) = 112 (Int64): False
//
//       value = sbyte1:            True
//       112 (Int32) = 112 (SByte): False
//
//       value = ushort1:            True
//       112 (Int32) = 112 (UInt16): False
//
//       value = ulong1:             False
//       112 (Int32) = 112 (UInt64): False
//
//       value = dec1:                False
//       112 (Int32) = 112 (Decimal): False
//
//       value = dbl1:               False
//       112 (Int32) = 112 (Double): False


let value = 112

let testObjectForEquality (obj: obj) =
    printfn $"{value} ({value.GetType().Name}) = {obj} ({obj.GetType().Name}): {value.Equals obj}\n"

let byte1 = 112uy
printfn $"value = byte1: {value.Equals(int byte1),15}"
testObjectForEquality byte1

let short1 = 112s
printfn $"value = short1: {value.Equals(int short1),15}"
testObjectForEquality short1

let long1 = 112L
printfn $"value = long1: {value.Equals(int long1),17}"
testObjectForEquality long1

let sbyte1 = 112y
printfn $"value = sbyte1: {value.Equals(int sbyte1),15}"
testObjectForEquality sbyte1

let ushort1 = 112us
printfn $"value = ushort1: {value.Equals(int ushort1),15}"
testObjectForEquality ushort1

let ulong1 = 112uL
printfn $"value = ulong1: {value.Equals(int ulong1),17}"
testObjectForEquality ulong1

let dec1 = 112M
printfn $"value = dec1: {value.Equals(int dec1),20}"
testObjectForEquality dec1

let dbl1 = 112.0
printfn $"value = dbl1: {value.Equals(int dbl1),19}"
testObjectForEquality dbl1


// The example displays the following output:
//       value = byte1:            True
//       112 (Int32) = 112 (Byte): False
//
//       value = short1:            True
//       112 (Int32) = 112 (Int16): False
//
//       value = long1:             False
//       112 (Int32) = 112 (Int64): False
//
//       value = sbyte1:            True
//       112 (Int32) = 112 (SByte): False
//
//       value = ushort1:            True
//       112 (Int32) = 112 (UInt16): False
//
//       value = ulong1:             False
//       112 (Int32) = 112 (UInt64): False
//
//       value = dec1:                False
//       112 (Int32) = 112 (Decimal): False
//
//       value = dbl1:               False
//       112 (Int32) = 112 (Double): False

Module Example
   Dim value As Int32 = 112
   
   Public Sub Main()
      Dim byte1 As Byte = 112
      Console.WriteLine("value = byte1: {0,15}", value.Equals(byte1))
      TestObjectForEquality(byte1)
      
      Dim short1 As Short = 112
      Console.WriteLine("value = short1: {0,15}", value.Equals(short1))
      TestObjectForEquality(short1)

      Dim long1 As Long = 112
      Console.WriteLine("value = long1: {0,17}", value.Equals(long1))
      TestObjectForEquality(long1)

      Dim sbyte1 As SByte = 112
      Console.WriteLine("value = sbyte1: {0,15}", value.Equals(sbyte1))
      TestObjectForEquality(sbyte1)
      
      Dim ushort1 As UShort = 112
      Console.WriteLine("value = ushort1: {0,15}", value.Equals(ushort1))
      TestObjectForEquality(ushort1)

      Dim ulong1 As ULong = 112
      Console.WriteLine("value = ulong1: {0,17}", value.Equals(ulong1))
      TestObjectForEquality(ulong1)

      Dim dec1 As Decimal = 112d
      Console.WriteLine("value = dec1: {0,20}", value.Equals(dec1))
      TestObjectForEquality(dec1)

      Dim dbl1 As Double = 112
      Console.WriteLine("value = dbl1: {0,19}", value.Equals(dbl1))
      TestObjectForEquality(dbl1)
   End Sub
   
   Private Sub TestObjectForEquality(obj As Object)
      Console.WriteLine("{0} ({1}) = {2} ({3}): {4}",
                        value, value.GetType().Name,
                        obj, obj.GetType().Name,
                        value.Equals(obj))
      Console.WriteLine()
   End Sub
End Module
' The example displays the following output:
'       value = byte1:            True
'       112 (Int32) = 112 (Byte): False
'
'       value = short1:            True
'       112 (Int32) = 112 (Int16): False
'
'       value = long1:             False
'       112 (Int32) = 112 (Int64): False
'
'       value = sbyte1:            True
'       112 (Int32) = 112 (SByte): False
'
'       value = ushort1:            True
'       112 (Int32) = 112 (UInt16): False
'
'       value = ulong1:             False
'       112 (Int32) = 112 (UInt64): False
'
'       value = dec1:                False
'       112 (Int32) = 112 (Decimal): False
'
'       value = dbl1:               False
'       112 (Int32) = 112 (Double): False

适用于

Equals(Object)

Source:
Int32.cs
Source:
Int32.cs
Source:
Int32.cs

返回一个值，该值指示此实例是否等于指定的对象。

public:
 override bool Equals(System::Object ^ obj);
public override bool Equals (object obj);
public override bool Equals (object? obj);
override this.Equals : obj -> bool
Public Overrides Function Equals (obj As Object) As Boolean

参数

obj
Object

与此实例进行比较的对象。

返回

Boolean

如果 true 是 obj 的实例并且等于此实例的值，则为 Int32；否则为 false。

示例

以下示例说明 Equals 在 的上下文 Int32中使用 ，比较两个 int 值，如果它们表示相同的数字，则返回 true ，或者 false 如果它们不表示，则返回 。

Int32 myVariable1 = 60;
Int32 myVariable2 = 60;

// Get and display the declaring type.
Console::WriteLine( "\nType of 'myVariable1' is '{0}' and  value is : {1}", myVariable1.GetType(), myVariable1 );
Console::WriteLine( "Type of 'myVariable2' is '{0}' and  value is : {1}", myVariable2.GetType(), myVariable2 );

// Compare 'myVariable1' instance with 'myVariable2' Object.
if ( myVariable1.Equals( myVariable2 ) )
      Console::WriteLine( "\nStructures 'myVariable1' and 'myVariable2' are equal" );
else
      Console::WriteLine( "\nStructures 'myVariable1' and 'myVariable2' are not equal" );

Int32 myVariable1 = 60;
Int32 myVariable2 = 60;

// Get and display the declaring type.
Console.WriteLine("\nType of 'myVariable1' is '{0}' and"+
     " value is :{1}",myVariable1.GetType(), myVariable1);
Console.WriteLine("Type of 'myVariable2' is '{0}' and"+
     " value is :{1}",myVariable2.GetType(), myVariable2);

// Compare 'myVariable1' instance with 'myVariable2' Object.
if( myVariable1.Equals( myVariable2 ) )
   Console.WriteLine( "\nStructures 'myVariable1' and "+
         "'myVariable2' are equal");
else
   Console.WriteLine( "\nStructures 'myVariable1' and "+
         "'myVariable2' are not equal");

let myVariable1 = 60
let myVariable2 = 60

// Get and display the declaring type.
printfn $"\nType of 'myVariable1' is '{myVariable1.GetType()}' and value is: {myVariable1}"
printfn $"Type of 'myVariable2' is '{myVariable2.GetType()}' and value is: {myVariable2}"

// Compare 'myVariable1' instance with 'myVariable2' Object.
if myVariable1.Equals myVariable2 then
    printfn "\nStructures 'myVariable1' and 'myVariable2' are equal"
else
    printfn "\nStructures 'myVariable1' and 'myVariable2' are not equal"

Dim myVariable1 As Int32 = 60
Dim myVariable2 As Int32 = 60

' Get and display the declaring type.
Console.WriteLine(ControlChars.NewLine + "Type of 'myVariable1' is '{0}' and" +  _
         " value is :{1}", myVariable1.GetType().ToString(), myVariable1.ToString())
Console.WriteLine("Type of 'myVariable2' is '{0}' and" +  _
         " value is :{1}", myVariable2.GetType().ToString(), myVariable2.ToString())

' Compare 'myVariable1' instance with 'myVariable2' Object.
If myVariable1.Equals(myVariable2) Then
   Console.WriteLine(ControlChars.NewLine + "Structures 'myVariable1' and " +  _
            "'myVariable2' are equal")
Else
   Console.WriteLine(ControlChars.NewLine + "Structures 'myVariable1' and " + _
         "'myVariable2' are not equal")
End If

调用方说明

编译器重载解析可能说明两 Equals(Int32) 种方法重载的行为存在明显差异。 如果定义了 参数和 之间的Int32隐式转换obj，并且参数未类型化为 ，Object编译器将执行隐式转换并调用 Equals(Int32) 方法。 否则，它们会调用 Equals(Object) 方法，如果其obj参数不是Int32值，则该方法始终返回 false 。 以下示例演示了两个方法重载之间的行为差异。 对于 、、 和 值，第一个比较返回true是因为编译器自动执行扩大转换并调用 Equals(Int32) 方法，而第二个比较返回false是因为编译器调用 Equals(Object) 方法。UInt16SByteInt16Byte

using System;

public class Example
{
   static int value = 112;

   public static void Main()
   {
      byte byte1= 112;
      Console.WriteLine("value = byte1: {0,15}", value.Equals(byte1));
      TestObjectForEquality(byte1);

      short short1 = 112;
      Console.WriteLine("value = short1: {0,15}", value.Equals(short1));
      TestObjectForEquality(short1);

      long long1 = 112;
      Console.WriteLine("value = long1: {0,17}", value.Equals(long1));
      TestObjectForEquality(long1);

      sbyte sbyte1 = 112;
      Console.WriteLine("value = sbyte1: {0,15}", value.Equals(sbyte1));
      TestObjectForEquality(sbyte1);

      ushort ushort1 = 112;
      Console.WriteLine("value = ushort1: {0,15}", value.Equals(ushort1));
      TestObjectForEquality(ushort1);

      ulong ulong1 = 112;
      Console.WriteLine("value = ulong1: {0,17}", value.Equals(ulong1));
      TestObjectForEquality(ulong1);

      decimal dec1 = 112m;
      Console.WriteLine("value = dec1: {0,20}", value.Equals(dec1));
      TestObjectForEquality(dec1);

      double dbl1 = 112;
      Console.WriteLine("value = dbl1: {0,19}", value.Equals(dbl1));
      TestObjectForEquality(dbl1);
   }

   private static void TestObjectForEquality(Object obj)
   {
      Console.WriteLine("{0} ({1}) = {2} ({3}): {4}\n",
                        value, value.GetType().Name,
                        obj, obj.GetType().Name,
                        value.Equals(obj));
   }
}
// The example displays the following output:
//       value = byte1:            True
//       112 (Int32) = 112 (Byte): False
//
//       value = short1:            True
//       112 (Int32) = 112 (Int16): False
//
//       value = long1:             False
//       112 (Int32) = 112 (Int64): False
//
//       value = sbyte1:            True
//       112 (Int32) = 112 (SByte): False
//
//       value = ushort1:            True
//       112 (Int32) = 112 (UInt16): False
//
//       value = ulong1:             False
//       112 (Int32) = 112 (UInt64): False
//
//       value = dec1:                False
//       112 (Int32) = 112 (Decimal): False
//
//       value = dbl1:               False
//       112 (Int32) = 112 (Double): False


let value = 112

let testObjectForEquality (obj: obj) =
    printfn $"{value} ({value.GetType().Name}) = {obj} ({obj.GetType().Name}): {value.Equals obj}\n"

let byte1 = 112uy
printfn $"value = byte1: {value.Equals(int byte1),15}"
testObjectForEquality byte1

let short1 = 112s
printfn $"value = short1: {value.Equals(int short1),15}"
testObjectForEquality short1

let long1 = 112L
printfn $"value = long1: {value.Equals(int long1),17}"
testObjectForEquality long1

let sbyte1 = 112y
printfn $"value = sbyte1: {value.Equals(int sbyte1),15}"
testObjectForEquality sbyte1

let ushort1 = 112us
printfn $"value = ushort1: {value.Equals(int ushort1),15}"
testObjectForEquality ushort1

let ulong1 = 112uL
printfn $"value = ulong1: {value.Equals(int ulong1),17}"
testObjectForEquality ulong1

let dec1 = 112M
printfn $"value = dec1: {value.Equals(int dec1),20}"
testObjectForEquality dec1

let dbl1 = 112.0
printfn $"value = dbl1: {value.Equals(int dbl1),19}"
testObjectForEquality dbl1


// The example displays the following output:
//       value = byte1:            True
//       112 (Int32) = 112 (Byte): False
//
//       value = short1:            True
//       112 (Int32) = 112 (Int16): False
//
//       value = long1:             False
//       112 (Int32) = 112 (Int64): False
//
//       value = sbyte1:            True
//       112 (Int32) = 112 (SByte): False
//
//       value = ushort1:            True
//       112 (Int32) = 112 (UInt16): False
//
//       value = ulong1:             False
//       112 (Int32) = 112 (UInt64): False
//
//       value = dec1:                False
//       112 (Int32) = 112 (Decimal): False
//
//       value = dbl1:               False
//       112 (Int32) = 112 (Double): False

Module Example
   Dim value As Int32 = 112
   
   Public Sub Main()
      Dim byte1 As Byte = 112
      Console.WriteLine("value = byte1: {0,15}", value.Equals(byte1))
      TestObjectForEquality(byte1)
      
      Dim short1 As Short = 112
      Console.WriteLine("value = short1: {0,15}", value.Equals(short1))
      TestObjectForEquality(short1)

      Dim long1 As Long = 112
      Console.WriteLine("value = long1: {0,17}", value.Equals(long1))
      TestObjectForEquality(long1)

      Dim sbyte1 As SByte = 112
      Console.WriteLine("value = sbyte1: {0,15}", value.Equals(sbyte1))
      TestObjectForEquality(sbyte1)
      
      Dim ushort1 As UShort = 112
      Console.WriteLine("value = ushort1: {0,15}", value.Equals(ushort1))
      TestObjectForEquality(ushort1)

      Dim ulong1 As ULong = 112
      Console.WriteLine("value = ulong1: {0,17}", value.Equals(ulong1))
      TestObjectForEquality(ulong1)

      Dim dec1 As Decimal = 112d
      Console.WriteLine("value = dec1: {0,20}", value.Equals(dec1))
      TestObjectForEquality(dec1)

      Dim dbl1 As Double = 112
      Console.WriteLine("value = dbl1: {0,19}", value.Equals(dbl1))
      TestObjectForEquality(dbl1)
   End Sub
   
   Private Sub TestObjectForEquality(obj As Object)
      Console.WriteLine("{0} ({1}) = {2} ({3}): {4}",
                        value, value.GetType().Name,
                        obj, obj.GetType().Name,
                        value.Equals(obj))
      Console.WriteLine()
   End Sub
End Module
' The example displays the following output:
'       value = byte1:            True
'       112 (Int32) = 112 (Byte): False
'
'       value = short1:            True
'       112 (Int32) = 112 (Int16): False
'
'       value = long1:             False
'       112 (Int32) = 112 (Int64): False
'
'       value = sbyte1:            True
'       112 (Int32) = 112 (SByte): False
'
'       value = ushort1:            True
'       112 (Int32) = 112 (UInt16): False
'
'       value = ulong1:             False
'       112 (Int32) = 112 (UInt64): False
'
'       value = dec1:                False
'       112 (Int32) = 112 (Decimal): False
'
'       value = dbl1:               False
'       112 (Int32) = 112 (Double): False

另请参阅

适用于