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Super keywordIn a subclass that represents a reference to a parent class object, you can call the properties of a method in the parent class in a subclass.Super Statement---Subclass after inheriting the parent class, the child class will have a super statement in its construction method.If the super statement is not manually specified, the parent class is called

Python advanced-MRO and super in succession Write in front If not specifically stated, the following are based on Python3 SummaryThis article describes Python how an inheritance relationship can be super() returned by calling the "parent class" method, super(Type, CurrentClass) returning the proxy for the CurrentClass MRO Type next class, and how to des

This article mainly introduces the usage of the super keyword in Python. The example analyzes the function and related usage skills of the super keyword. If you need it, refer to the example in this article to describe the usage of the super keyword in Python. Share it with you for your reference. The specific analysis is as follows: In the method of a Python cl

1. Subclass constructors If you want to refer to super, you must put super in the first place of the function.class Base {Base () {System. out. println ("Base");}} Publicclass Checket extends Base {Checket () {Super ();//Call the constructor of the parent class, be sure to put it in the first statement of the methodSystem. out. println ("Checket");} PublicStatic

Animal class:Package com.cnblogs;public class Cat extends animal{Default constructor with no parametersPublic Cat () {Super (); must appear in the first row of the construction method. This ();Super ();Super ("XX", 10); The code represents the constructor that invokes the parent class with a parameterSystem.out.println ("Cat Builder"); }/ * public String name;pu

The Super keyword is similar to this, which is used to represent an instance of the current class, and super is used to represent the parent class.Super can be used in subclasses, by Dot (.) To get the member variables and methods of the parent class. Super can also be used in subclass subclasses, where Java can automatically trace back to the upper class.The beh

In Python multiple inheritance, take advantage of super (). The parent class method, you can call all the parent classes, so that in the state of the override, the call to all the parent class again!Cases:Print"****** multiple inheritance using super (). __init__ occurrence state ******")ClassParent(object):Def__init__(Self, name, *args, **kwargs):# to avoid multiple inheritance errors, use variable length

Recently in the internal class, but was "why anonymous internal class or local internal class use method of local variables, local variables must be final type" troubled, when looking for information on the Internet, I found that class initialization completely do not understand, before the understanding is wrong! So looking back at the basic initialization, when looking at the initialization, it was found that "why only the first line of the constructor to write this () or

1. Subclass constructors If you want to refer to super, you must put super in the first place of the function . 1 classBase {2 Base () {3System.out.println ("Base");4 }5 }6 7 Public classChecketextendsBase {8 Checket () {9 Super();//call the constructor of the parent class, and be sure to put it in the first statement of the methodTenSystem.out.prin

We already know that if a member variable defined in a subclass has the same name as a member variable in the parent class, the member variable in the parent class cannot be inherited, and the member variable of the child class is called the member variable of the parent class is hidden.When a method is defined in a subclass, and the method's name, return type, number of arguments, and a method of the parent class are exactly the same, this method of the parent class is hidden (rewritten), neith

* Super: Can be used to modify properties, methods, constructors*when a subclass has a property of the same name as the parent class, you can explicitly call the attribute declared in the parent class by the super. This property.* If you want to invoke a property with the same name as the subclass "This property"** *) When a subclass overrides a method of a parent class, it is necessary to use the "

First, this keyword 1, description The This keyword represents the object of the current class and can access the properties, methods, constructors of this classNote: who calls the method, this refers to who2. GrammarAccess properties:this. property name = value;SYSTEM.OUT.PRINTLN (this. Attribute name);Access method:This. Method name ();To access the constructor:This ([parameter list]);3. PrecautionsIn general, if you access the members of the current class internally, you can access it directl

The MRO (Method resolution Order) is used by Python to parse the order of the method calls, and the MRO records the class type sequence of all the base classes of a class, and super does not simply call the method of the base class, but instead invokes the method of the class in the order of the MRO.When super () is used, it should be used in all classes, otherwise there may be cases where the class constru

decorated.Final decorated member variables, the final variable must be assigned, the value of the base reference type cannot be modified, the object that references the execution cannot be modified, but the contents of the object can be modified.Note that classes or methods cannot be abstractor and final decorated at the same time, and Abstractor classes and methods must be extended and rewritten.---------------------------------------------------------------------------------------------------

1 PackageCom.lovo;2 3 Importjava.util.Arrays;4 5 /**6 * Super Array7 * 8 * @authorAdministrator9 * Ten * @param One */ A Public classSuperarray { - Privatet[] array; - Private intsize; the - /** - * Constructors for super arrays - */ + PublicSuperarray () { - This(8); + } A at /** - * Constructors for super arrays -

About the difference between self and super,The first thing to know about 1 is what self is and what super is. What 2,[Super init] does. 3, why should self = [super init];What is 1,self and what is super?> In dynamic methods, self represents an "object"> In static methods, s

Python: super Getting started with super () In class inheritance, If you redefine a method, this method will overwrite the method of the same name as the parent class, but sometimes we want to implement the function of the parent class at the same time, we need to call the method of the parent class, which can be implemented by using super, for example: Class Ani

------Super keyword------Super Purpose: Access superclass "hidden member variables (whether static or not) and static methods" and "overridden instance methods" in subclasses. The superclass here must be a "direct superclass", the most recent superclass above the subclass.How to use Super:① calls the constructor of the superclass in the subclass construction meth

1. Subclass constructors If you want to refer to super, you must put super in the first place of the function. class Base {base () {System.out.println ("base"); }} public class Checket extends Base {checket () {super ();//Call the constructor of the parent class, be sure to place the first statement of the method System.out.println ("Che Cket "); } public s