Int32.Equals Method
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Returns a value indicating whether this instance is equal to a specified Int32 value.
Equals(Int32) |
Returns a value indicating whether this instance is equal to a specified Int32 value. |
Equals(Object) |
Returns a value indicating whether this instance is equal to a specified object. |
- Source:
- Int32.cs
- Source:
- Int32.cs
- Source:
- Int32.cs
Returns a value indicating whether this instance is equal to a specified Int32 value.
public:
virtual bool Equals(int obj);
public bool Equals (int obj);
override this.Equals : int -> bool
Public Function Equals (obj As Integer) As Boolean
Parameters
Returns
true
if obj
has the same value as this instance; otherwise, false
.
Implements
Remarks
This method implements the System.IEquatable<T> interface, and performs slightly better than Int32.Equals(Object) because it does not have to convert the obj
parameter to an object.
Notes to Callers
Compiler overload resolution may account for an apparent difference in the behavior of the two Equals(Int32) method overloads. If an implicit conversion between the obj
argument and an Int32 is defined and the argument is not typed as an Object, compilers perform an implicit conversion and call the Equals(Int32) method. Otherwise, they call the Equals(Object) method, which always returns false
if its obj
argument is not an Int32 value. The following example illustrates the difference in behavior between the two method overloads. In the case of the Byte, Int16, SByte, and UInt16 values, the first comparison returns true
because the compiler automatically performs a widening conversion and calls the Equals(Int32) method, whereas the second comparison returns false
because the compiler calls the Equals(Object) method.
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
Applies to
.NET 9 e outras versões
Produto | Versões |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1 |
UWP | 10.0 |
- Source:
- Int32.cs
- Source:
- Int32.cs
- Source:
- Int32.cs
Returns a value indicating whether this instance is equal to a specified object.
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
Parameters
- obj
- Object
An object to compare with this instance.
Returns
true
if obj
is an instance of Int32 and equals the value of this instance; otherwise, false
.
Examples
The following example illustrates the use of Equals
in the context of Int32
, comparing two int
values and returning true
if they represent the same number, or false
if they do not.
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
Notes to Callers
Compiler overload resolution may account for an apparent difference in the behavior of the two Equals(Int32) method overloads. If an implicit conversion between the obj
argument and an Int32 is defined and the argument is not typed as an Object, compilers perform an implicit conversion and call the Equals(Int32) method. Otherwise, they call the Equals(Object) method, which always returns false
if its obj
argument is not an Int32 value. The following example illustrates the difference in behavior between the two method overloads. In the case of the Byte, Int16, SByte, and UInt16 values, the first comparison returns true
because the compiler automatically performs a widening conversion and calls the Equals(Int32) method, whereas the second comparison returns false
because the compiler calls the Equals(Object) method.
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
See also
Applies to
.NET 9 e outras versões
Produto | Versões |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1 |
UWP | 10.0 |
Comentários do .NET
O .NET é um projeto código aberto. Selecione um link para fornecer comentários: