Int16.Equals Method

  • Reference

Definition

Namespace:
System
Assembly:
System.Runtime.dll
Assembly:
mscorlib.dll
Assembly:
netstandard.dll

Returns a value indicating whether this instance is equal to a specified object or Int16.

Overloads

Equals(Int16)

Returns a value indicating whether this instance is equal to a specified Int16 value.
Equals(Object)

Returns a value indicating whether this instance is equal to a specified object.

Equals(Int16)

Source:
Int16.cs
Source:
Int16.cs
Source:
Int16.cs

Returns a value indicating whether this instance is equal to a specified Int16 value.

public:
 virtual bool Equals(short obj);
public bool Equals (short obj);
override this.Equals : int16 -> bool
Public Function Equals (obj As Short) As Boolean

Parameters

obj
Int16

An Int16 value to compare to this instance.

Returns

Boolean

true if obj has the same value as this instance; otherwise, false.

Implements

Equals(T)

Remarks

This method implements the System.IEquatable<T> interface, and performs slightly better than Equals 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(Int16) method overloads. If an implicit conversion between the obj argument and an Int16 is defined and the argument is not typed as an Object, compilers perform an implicit conversion and call the Equals(Int16) method. Otherwise, they call the Equals(Object) method, which always returns false if its obj argument is not an Int16 value. The following example illustrates the difference in behavior between the two method overloads. In the case of the Byte and SByte values, the first comparison returns true because the compiler automatically performs a widening conversion and calls the Equals(Int16) method, whereas the second comparison returns false because the compiler calls the Equals(Object) method.

using System;

public class Example
{
   static short value = 112;

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

      int int1 = 112;
      Console.WriteLine("value = int1: {0,17}", value.Equals(int1));
      TestObjectForEquality(int1);

      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);

      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 (Int16) = 112 (Byte): False
//
//       value = int1:             False
//       112 (Int16) = 112 (Int32): False
//
//       value = sbyte1:            True
//       112 (Int16) = 112 (SByte): False
//
//       value = ushort1:            False
//       112 (Int16) = 112 (UInt16): False
//
//       value = dec1:                False
//       112 (Int16) = 112 (Decimal): False
//
//       value = dbl1:               False
//       112 (Int16) = 112 (Double): False

let value = 112s

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(int16 byte1),15}"
testObjectForEquality byte1

let int1 = 112
printfn $"value = int1: {value.Equals(int16 int1),17}"
testObjectForEquality int1

let sbyte1 = 112uy
printfn $"value = sbyte1: {value.Equals(int16 sbyte1),15}"
testObjectForEquality sbyte1

let ushort1 = 112us
printfn $"value = ushort1: {value.Equals(int16 ushort1),15}"
testObjectForEquality ushort1

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

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

// The example displays the following output:
//       value = byte1:            True
//       112 (Int16) = 112 (Byte): False
//
//       value = int1:             False
//       112 (Int16) = 112 (Int32): False
//
//       value = sbyte1:            True
//       112 (Int16) = 112 (SByte): False
//
//       value = ushort1:            False
//       112 (Int16) = 112 (UInt16): False
//
//       value = dec1:                False
//       112 (Int16) = 112 (Decimal): False
//
//       value = dbl1:               False
//       112 (Int16) = 112 (Double): False

Module Example
   Dim value As Int16 = 112
   
   Public Sub Main()
      Dim byte1 As Byte = 112
      Console.WriteLine("value = byte1: {0,15}", value.Equals(byte1))
      TestObjectForEquality(byte1)
      
      Dim int1 As Integer = 112
      Console.WriteLine("value = int1: {0,17}", value.Equals(int1))
      TestObjectForEquality(int1)

      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: {0,16}", value.Equals(ushort1))
      TestObjectForEquality(ushort1)

      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 (Int16) = 112 (Byte): False
'
'       value = int1:             False
'       112 (Int16) = 112 (Int32): False
'
'       value = sbyte1:            True
'       112 (Int16) = 112 (SByte): False
'
'       value = ushort1:            False
'       112 (Int16) = 112 (UInt16): False
'
'       value = dec1:                False
'       112 (Int16) = 112 (Decimal): False
'
'       value = dbl1:               False
'       112 (Int16) = 112 (Double): False

See also

Applies to

Equals(Object)

Source:
Int16.cs
Source:
Int16.cs
Source:
Int16.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 to this instance.

Returns

Boolean

true if obj is an instance of Int16 and equals the value of this instance; otherwise, false.

Examples

The following code example illustrates the use of Equals in the context of Int16, comparing two short values and returning true if they represent the same number, or false if they do not.

Int16 myVariable1 = 20;
Int16 myVariable2 = 20;

// 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" );

Int16 myVariable1 = 20;
Int16 myVariable2 = 20;

// 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 = 20s
let myVariable2 = 20s

// Get and display the declaring type.
printfn $"\nType of 'myVariable1' is '{myVariable1.GetType()}' and value is: {myVariable1}"
printfn $"\nType of 'myVariable1' 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 Int16 = 20
  Dim myVariable2 As Int16 = 20
  
' 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(Int16) method overloads. If an implicit conversion between the obj argument and an Int16 is defined and the argument is not typed as an Object, compilers perform an implicit conversion and call the Equals(Int16) method. Otherwise, they call the Equals(Object) method, which always returns false if its obj argument is not an Int16 value. The following example illustrates the difference in behavior between the two method overloads. In the case of the Byte and SByte values, the first comparison returns true because the compiler automatically performs a widening conversion and calls the Equals(Int16) method, whereas the second comparison returns false because the compiler calls the Equals(Object) method.

using System;

public class Example
{
   static short value = 112;

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

      int int1 = 112;
      Console.WriteLine("value = int1: {0,17}", value.Equals(int1));
      TestObjectForEquality(int1);

      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);

      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 (Int16) = 112 (Byte): False
//
//       value = int1:             False
//       112 (Int16) = 112 (Int32): False
//
//       value = sbyte1:            True
//       112 (Int16) = 112 (SByte): False
//
//       value = ushort1:            False
//       112 (Int16) = 112 (UInt16): False
//
//       value = dec1:                False
//       112 (Int16) = 112 (Decimal): False
//
//       value = dbl1:               False
//       112 (Int16) = 112 (Double): False

let value = 112s

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(int16 byte1),15}"
testObjectForEquality byte1

let int1 = 112
printfn $"value = int1: {value.Equals(int16 int1),17}"
testObjectForEquality int1

let sbyte1 = 112uy
printfn $"value = sbyte1: {value.Equals(int16 sbyte1),15}"
testObjectForEquality sbyte1

let ushort1 = 112us
printfn $"value = ushort1: {value.Equals(int16 ushort1),15}"
testObjectForEquality ushort1

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

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

// The example displays the following output:
//       value = byte1:            True
//       112 (Int16) = 112 (Byte): False
//
//       value = int1:             False
//       112 (Int16) = 112 (Int32): False
//
//       value = sbyte1:            True
//       112 (Int16) = 112 (SByte): False
//
//       value = ushort1:            False
//       112 (Int16) = 112 (UInt16): False
//
//       value = dec1:                False
//       112 (Int16) = 112 (Decimal): False
//
//       value = dbl1:               False
//       112 (Int16) = 112 (Double): False

Module Example
   Dim value As Int16 = 112
   
   Public Sub Main()
      Dim byte1 As Byte = 112
      Console.WriteLine("value = byte1: {0,15}", value.Equals(byte1))
      TestObjectForEquality(byte1)
      
      Dim int1 As Integer = 112
      Console.WriteLine("value = int1: {0,17}", value.Equals(int1))
      TestObjectForEquality(int1)

      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: {0,16}", value.Equals(ushort1))
      TestObjectForEquality(ushort1)

      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 (Int16) = 112 (Byte): False
'
'       value = int1:             False
'       112 (Int16) = 112 (Int32): False
'
'       value = sbyte1:            True
'       112 (Int16) = 112 (SByte): False
'
'       value = ushort1:            False
'       112 (Int16) = 112 (UInt16): False
'
'       value = dec1:                False
'       112 (Int16) = 112 (Decimal): False
'
'       value = dbl1:               False
'       112 (Int16) = 112 (Double): False

Applies to