super why toys

this:First, call another constructor using this (parameter list). This is only used in the constructor of the class and cannot be used in other places.2. When the name of a function parameter or local variable in the function is the same as that of a member variable, the member variable is blocked. To access the member variable, you must use "this. to reference member variables. Of course, without the same name, you can directly use the name of the member variable instead of this. If you use th

Original address: https://www.cnblogs.com/hasse/p/5023392.htmlThese days to see the class in the inheritance will use this and super, here do a little summary, with you to communicate, there are errors please correct me ~ThisThis is an object of its own, representing the object itself, which can be understood as: A pointer to the object itself.The usage of this can be broadly divided into 3 types in Java:1. Normal Direct referencesThis does not have

The article turns from @implementation Son:father -(ID) init{ self = [super init]; if (self) { } return self; } This is an ordinary to initialization method that invokes the Init implementation of the parent class before the subclass implements initialization. Based on this initialization method, we compare the self and Super keywords from three aspects. what self is and what

Absrtact: In Java We will often use super and this usage, now I mainly to distinguish between super. And this and Superl () and this () the difference between them to know and understand:The usage of 1.this is in Java:①:this.:this refers to the current object, which can manipulate all the properties and methods inside the current class and the properties and methods that the parent inherits to allow access

Many users encounter the same problem in the super capacitor, that is, how to calculate the discharge time of a certain capacity super capacitor when a certain current is discharged, or according to the discharge current and discharge time, how to choose the capacity of the super capacitor, the following is a simple computing company. Based on this formula, you c

Enable super administrator privilege in Windows 7)(08:01:40) Use a superuser to log on to Windows 7 Login to Windows 7 with a Super User is the same as that of Vista. After the system is installed, a user is created and the Administrator permission is used, while the Administrator is disabled. In most optimized systems, the Administrator is used to log in directly. Although it is administrator permissio

Time limit:20 Sec Memory limit:552 MBsubmit:2435 solved:1195DescriptionSmall Z is a small famous pianist, recently Dr. C gave a small z a super piano, small z hope to use this piano to create the world's most beautiful music. The super piano can play n notes, numbered 1 to N. The magic of the I note is AI, where AI can be negative. A "super chord" consists of a n

open closed-loop ecosystem, the introduction of eco-TV-4th generation Super TV X50 Pro (Ultra 4 X50 Pro), priced 2999 yuan, Ultra 4 X50, pricing 2499 yuan, Super 4 X50 in the Super version, pricing 2699 Yuan. These three products can be lower than the production cost pricing, through the eco-subsidized hardware, leading the television industry into the hardware

First, super keyword　　use super in the Java class to refer to the composition of the parent class, use this to refer to the current object , and if a class inherits from another class, when we new the instance object of the subclass, there will be a parent class object inside the subclass object. How do you refer to the parent object inside? Using Super to refer

This article mainly introduces the usage examples of super in Python, this article compares the general inheritance with the super inheritance, from the results of the run, ordinary inheritance and super inheritance are the same, but in fact their internal operating mechanism is different, this point in multiple inheritance is evident, Need friends can refer to t

This is an object of its own, representing the object itself, which can be understood as: A pointer to the object itself.The usage of this can be broadly divided into 3 types in Java:1. Normal Direct referencesThis does not have to be said, this is equivalent to pointing to the current object itself.2. The name of the member who participates in the membership is distinguished by this:Class Person { private int: age = ten; Public person () { System.out.println ("Initialization Age:" +ag

Ext: 52205961The Python language has similar class inheritance to C + +, in which Python customizes the first self, like the this pointer in C + +, to the object itself.Examples of simple Python classes:[Python]View PlainCopy >>> class Hello (object): ... def print_c (): ...print"Hello world!" >>> hello (). Print_c () Hello world! Of course, in practice, the inevitable need for class inheritance, subclasses inherit the parent class, normal as follows:[Python]View