Object Clase
Importante
Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.
Admite todas las clases de la jerarquía de clases de .NET y proporciona servicios de bajo nivel a clases derivadas. Se trata de la clase base fundamental de todas las clases de .NET; es la raíz de la jerarquía de tipos.
public ref class System::Object
public class Object
[System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.AutoDual)]
[System.Serializable]
public class Object
[System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.AutoDual)]
[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public class Object
type obj = class
[<System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.AutoDual)>]
[<System.Serializable>]
type obj = class
[<System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.AutoDual)>]
[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type obj = class
Public Class Object
- Atributos
En el ejemplo siguiente se define un tipo Point derivado de la Object clase y se invalidan muchos de los métodos virtuales de la Object clase . Además, en el ejemplo se muestra cómo llamar a muchos de los métodos estáticos e de instancia de la Object clase .
using System;
// The Point class is derived from System.Object.
class Point
{
public int x, y;
public Point(int x, int y)
{
this.x = x;
this.y = y;
}
public override bool Equals(object obj)
{
// If this and obj do not refer to the same type, then they are not equal.
if (obj.GetType() != this.GetType()) return false;
// Return true if x and y fields match.
var other = (Point) obj;
return (this.x == other.x) && (this.y == other.y);
}
// Return the XOR of the x and y fields.
public override int GetHashCode()
{
return x ^ y;
}
// Return the point's value as a string.
public override String ToString()
{
return $"({x}, {y})";
}
// Return a copy of this point object by making a simple field copy.
public Point Copy()
{
return (Point) this.MemberwiseClone();
}
}
public sealed class App
{
static void Main()
{
// Construct a Point object.
var p1 = new Point(1,2);
// Make another Point object that is a copy of the first.
var p2 = p1.Copy();
// Make another variable that references the first Point object.
var p3 = p1;
// The line below displays false because p1 and p2 refer to two different objects.
Console.WriteLine(Object.ReferenceEquals(p1, p2));
// The line below displays true because p1 and p2 refer to two different objects that have the same value.
Console.WriteLine(Object.Equals(p1, p2));
// The line below displays true because p1 and p3 refer to one object.
Console.WriteLine(Object.ReferenceEquals(p1, p3));
// The line below displays: p1's value is: (1, 2)
Console.WriteLine($"p1's value is: {p1.ToString()}");
}
}
// This code example produces the following output:
//
// False
// True
// True
// p1's value is: (1, 2)
//
open System
// The Point class is derived from System.Object.
type Point(x, y) =
member _.X = x
member _.Y = y
override _.Equals obj =
// If this and obj do not refer to the same type, then they are not equal.
match obj with
| :? Point as other ->
// Return true if x and y fields match.
x = other.X && y = other.Y
| _ ->
false
// Return the XOR of the x and y fields.
override _.GetHashCode() =
x ^^^ y
// Return the point's value as a string.
override _.ToString() =
$"({x}, {y})"
// Return a copy of this point object by making a simple field copy.
member this.Copy() =
this.MemberwiseClone() :?> Point
// Construct a Point object.
let p1 = Point(1,2)
// Make another Point object that is a copy of the first.
let p2 = p1.Copy()
// Make another variable that references the first Point object.
let p3 = p1
// The line below displays false because p1 and p2 refer to two different objects.
printfn $"{Object.ReferenceEquals(p1, p2)}"
// The line below displays true because p1 and p2 refer to two different objects that have the same value.
printfn $"{Object.Equals(p1, p2)}"
// The line below displays true because p1 and p3 refer to one object.
printfn $"{Object.ReferenceEquals(p1, p3)}"
// The line below displays: p1's value is: (1, 2)
printfn $"p1's value is: {p1.ToString()}"
// This code example produces the following output:
//
// False
// True
// True
// p1's value is: (1, 2)
//
using namespace System;
// The Point class is derived from System.Object.
ref class Point
{
public:
int x;
public:
int y;
public:
Point(int x, int y)
{
this->x = x;
this->y = y;
}
public:
virtual bool Equals(Object^ obj) override
{
// If this and obj do not refer to the same type,
// then they are not equal.
if (obj->GetType() != this->GetType())
{
return false;
}
// Return true if x and y fields match.
Point^ other = (Point^) obj;
return (this->x == other->x) && (this->y == other->y);
}
// Return the XOR of the x and y fields.
public:
virtual int GetHashCode() override
{
return x ^ y;
}
// Return the point's value as a string.
public:
virtual String^ ToString() override
{
return String::Format("({0}, {1})", x, y);
}
// Return a copy of this point object by making a simple
// field copy.
public:
Point^ Copy()
{
return (Point^) this->MemberwiseClone();
}
};
int main()
{
// Construct a Point object.
Point^ p1 = gcnew Point(1, 2);
// Make another Point object that is a copy of the first.
Point^ p2 = p1->Copy();
// Make another variable that references the first
// Point object.
Point^ p3 = p1;
// The line below displays false because p1 and
// p2 refer to two different objects.
Console::WriteLine(
Object::ReferenceEquals(p1, p2));
// The line below displays true because p1 and p2 refer
// to two different objects that have the same value.
Console::WriteLine(Object::Equals(p1, p2));
// The line below displays true because p1 and
// p3 refer to one object.
Console::WriteLine(Object::ReferenceEquals(p1, p3));
// The line below displays: p1's value is: (1, 2)
Console::WriteLine("p1's value is: {0}", p1->ToString());
}
// This code produces the following output.
//
// False
// True
// True
// p1's value is: (1, 2)
' The Point class is derived from System.Object.
Class Point
Public x, y As Integer
Public Sub New(ByVal x As Integer, ByVal y As Integer)
Me.x = x
Me.y = y
End Sub
Public Overrides Function Equals(ByVal obj As Object) As Boolean
' If Me and obj do not refer to the same type, then they are not equal.
Dim objType As Type = obj.GetType()
Dim meType As Type = Me.GetType()
If Not objType.Equals(meType) Then
Return False
End If
' Return true if x and y fields match.
Dim other As Point = CType(obj, Point)
Return Me.x = other.x AndAlso Me.y = other.y
End Function
' Return the XOR of the x and y fields.
Public Overrides Function GetHashCode() As Integer
Return (x << 1) XOR y
End Function
' Return the point's value as a string.
Public Overrides Function ToString() As String
Return $"({x}, {y})"
End Function
' Return a copy of this point object by making a simple field copy.
Public Function Copy() As Point
Return CType(Me.MemberwiseClone(), Point)
End Function
End Class
NotInheritable Public Class App
Shared Sub Main()
' Construct a Point object.
Dim p1 As New Point(1, 2)
' Make another Point object that is a copy of the first.
Dim p2 As Point = p1.Copy()
' Make another variable that references the first Point object.
Dim p3 As Point = p1
' The line below displays false because p1 and p2 refer to two different objects.
Console.WriteLine([Object].ReferenceEquals(p1, p2))
' The line below displays true because p1 and p2 refer to two different objects
' that have the same value.
Console.WriteLine([Object].Equals(p1, p2))
' The line below displays true because p1 and p3 refer to one object.
Console.WriteLine([Object].ReferenceEquals(p1, p3))
' The line below displays: p1's value is: (1, 2)
Console.WriteLine($"p1's value is: {p1.ToString()}")
End Sub
End Class
' This example produces the following output:
'
' False
' True
' True
' p1's value is: (1, 2)
'
Para obtener más información sobre esta API, consulte Comentarios complementarios de la API para Object.
Equals(Object) |
Determina si el objeto especificado es igual que el objeto actual. |
Equals(Object, Object) |
Determina si las instancias del objeto especificado se consideran iguales. |
Finalize() |
Permite que un objeto intente liberar recursos y realizar otras operaciones de limpieza antes de que sea reclamado por la recolección de elementos no utilizados. |
Get |
Sirve como la función hash predeterminada. |
Get |
Obtiene el Type de la instancia actual. |
Memberwise |
Crea una copia superficial del Object actual. |
Reference |
Determina si las instancias de Object especificadas son la misma instancia. |
To |
Devuelve una cadena que representa el objeto actual. |
Producto | Versiones |
---|---|
.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 |
Los miembros estáticos públicos (Shared
en Visual Basic) de este tipo son seguros para subprocesos. No se garantiza que los miembros de instancia sean seguros para subprocesos.
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