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Java keywords: This, super usage Summary

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

Summary of usage of this and super in Java (GO)

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

Objective-c language--self and Super keyword parsing

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

PHP Super Global Variables Summary _php tutorial

PHP Super Global Variables Summary Summary of silicon1985 's important PHP Super global variables PHP has 9 predefined array of variables, summarized as follows: 1, $_server The $_server Super global variable contains information created by the Web server that provides information about the server and client configuration and the current request environment. De

PHP Super Global Variable summary _ PHP Tutorial

Summary of PHP Super global variables. Summary of PHP Super global variables important PHP Super global variables of silicon1985 summary PHP has nine predefined variable arrays, which are summarized as follows: 1. $ _ SERVER Super global variables include summary by PHP Super

Objective-c "Construction method (override, Scene, custom), super"

———————————————————————————————————————————Use of the Super keyword#import @interface Animal:nsobject-(void) run;-(void) eat;+ (void) eat;@end@implementation Animal-(void) run{NSLog (@ "Animal run!");}-(void) Eat{NSLog (@ "-animal eat!-");}+ (void) eat//verified that super cannot refer to the parent class object, nor can it invoke the class method of the parent class through

This and Super use summary (Java)

member member method.However, super is used in subclasses in order to access the masked members in the immediate parent class, and note that the immediate parent class is the closest superclass on the class. Here is an example of a comprehensive use of super, there are two classes: A Father class, a subclass of the Father class son, through these two classes fully demonstrates the use of

Java Essay: Super keyword

Super keywordFirst, Concept introduction.1. If you work in a company, there are some differences in the treatment of managers in the company with those of ordinary employees. However, there are many similarities between them, for example, they can get paid. It's just that the average employee gets paid only after the job is done, and the manager receives the bonus after the expected performance. This information is represented in part of the code belo

Java keyword Introduction of this and super

1. What is super? What is this? the Super keyword denotes the meaning of the super (parent) class. The This variable represents the object itself. 2. Using Superthiscalling member variables and methodsYou can use super to access a variable or overridden method that is hidden by the parent class quilt class. The current

Super Jie Ba 3500 Tutorial

Super Jie Ba 3500 Tips Mention hero Super Jie Ba, many Internet users are familiar with, as the first domestic player, Super Jie Ba turned out to lead the domestic software to rise with the international giants contend, breaking the foreign software products continue to monopolize the market pattern, it is a continuing to today's miracle. The hero has always bee

Java_ class and Object 03_ encapsulation and private, this, super, static keywords

A Package: A member variable in a class is private, which provides a public get () or set () for a private member variable.Benefits of Encapsulation:I. Hide implementation details and provide a common way to accessIi. improved reusability of the codeIii. Improving safetyThe principle of encapsulation (thought):I. Hide content that does not need to be provided externallyII. Hide attributes, provide public methods to access themThe embodiment of encapsulation: private is a manifestation of encapsu

How to get Win7 Super Administrator privileges

  To responds very well in Win 7, we need to have win 7 Super Admin privileges! Many of the operations of the win 7 operating system require a super administrator to run, but how do you get win 7 Super Admin Administrator privileges? This article introduces you to win the 7 Super Administrator rights method. 1, open t

Learn the Super keyword for Java tutorials

Learn to program the Java Tutorial Super keyword tutorial released, welcome to visit through Xuebiancheng8.com.The previous lesson analyzed the use of this keyword, this keyword has two functions, the first function is to access the current object construction method, the second role is to access the current object construction method, in fact, super and this keyword function similar, super's role has acces

This and super use

This and super use One, this use: One is to reference implicit arguments, and the other is to invoke other constructors of that class. second, super use: One is to call the superclass method, the other is to call the superclass constructor three, use examples Package COM.TEST.XQH; public class Manage extends Employee {private String sex; Public Manage (string name, int age, String sex) {

Deep understanding of the Super keyword __java in Java

/* * Write a little bit first, and then specifically have to take the Java programming ideas back to reference */ The network to check the Super keyword a lot of ideas are speaking, the Super keyword is a reference to an object of the parent class that represents a parent class object, but the following code test shows that if the parent class is an abstract class, the Superclass keyword can still be used t

list&lt;? Super t&gt; and Set <!--? extends T--> differences

Java generics keyword Description? wildcard character type Extends t> represents the upper bound of a type, which indicates that a parameterized type may be a subclass of T or T. The super t> represents the lower bound of the type (called a supertype qualifier in the Java core), indicating that the parameterized type is a supertype of this type (the parent type) until the object extends Sample Class Food {public static void Main (string[] args) {l

Summary of usage of this and super in Java

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

Super usage in Python

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

Research on super usage in Python __python

The Python language has similar class inheritance to C + +, and in the class definition, Python customizes the first self, similar to the this pointer in C + +, pointing to the object itself. Examples of Python simple classes: >>> class Hello (object): ... Def print_c (): . print "Hello world!" >>> hello (). Print_c () Hello world! Of course, in practice, the inevitable need for class inheritance, subclass inherits the parent class, normal as follows: >>> class Child (Hell

Tips for interaction between super terminals and embedded development boards in Windows XP

Tips for interaction between super terminals and embedded development boards in Windows XP Embedded Development Exchange Group 280352802, welcome to join!I. Introduction A Super Terminal is a universal serial interaction software provided by the Windows operating system. You can use this tool to configure vro and vswitches. Connect to another computer, Telnet site, announcement board system (BBS), online se

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