• Interface composition update


    Interface composition update overview Composition of interface constant public static final Abstract method public abstract Default method (Java 8) Abstract method (Java 8) Private method (Java 9) Default method in interface Upgrade the interface //Define an interface with two abstract methods public interface MyInterface{ void show1(); void show2(); } //Define two implementation classes of the […]

  • Cow break! Java Ali Daniel teaches you how to quickly understand object-oriented and make you more valuable


    Today’s sharing begins. Please give us more advice~ I Object oriented overview Object-oriented programming is a kind of programming thought in line with human thinking habits. Different from process oriented, object-oriented has its own unique advantages. For a popular example, if we want to get a wooden bed, facing the process, we may need to […]

  • Java foundation strengthening exercises


    Article referenceHi guest network Java actual combat preface In the last basic Java exercise, detailed ideas and answers are provided. The article is still being updated. This article will give you some more exercises on strengthening the foundation of Java at Amway. Each question is also attached with an answer link. Each step of the […]

  • Encapsulation, inheritance and polymorphism understanding in C + +


    encapsulation(encapsulation): it is to combine the abstract data and behavior (or function) to form an organic whole, that is, organically combine the data with the source code of operating data to form a “class”, in which data and functions are members of the class. The purpose of encapsulation is to enhance security and simplify programming. […]

  • Polymorphism of C + + (good content)


    Compilation environment: win10 vs2017 This blog is a little long, but it’s full of dry goods. We must see the last, that’s the point. What is polymorphism? As the name suggests, it is a variety of forms of the same thing in different scenes.   The following will be a detailed introduction. Static polymorphism As […]

  • Isn’t object-oriented programming beautiful?


    “I am a remnant of the old era, and the new era has no ship to carry me.” If object-oriented programming is a person, I guess he will feel this way when he is constantly criticized today. To tell you the truth, I have been programming with object-oriented method for more than ten years. I […]

  • Fundamentals of Python Programming 19: encapsulation, inheritance and polymorphism


    Article catalogue Zero. Learning objectives of this lecture 1、 Class encapsulation (1) Why package 1. Case demonstration 2. Case analysis 3. Solution (2) How to implement encapsulation 1. Definition of encapsulation 2. Implementation of encapsulation 3. Case demonstration 2、 Class inheritance (1) Inheritance overview (2) Single inheritance 1. Schematic diagram of single inheritance 2. Definition […]

  • IOS polymorphism


    OC has three characteristics: encapsulation, inheritance and polymorphism. The first two are relatively simple. Let’s talk about polymorphism here. I Basic concepts The embodiment of polymorphism in code is a variety of forms. There must be inheritance. Without inheritance, there will be no polymorphism.When polymorphism is used, dynamic detection is performed to call real object […]

  • The go interviewer asked me how to implement object orientation?


    Hello, I’m fried fish. When you first know go language, you will always compare the basic characteristics of other languages to go language. In short, it means that old knowledge is related to new knowledge to achieve higher learning efficiency. The most common analogy is “how does go language implement object orientation?”, Further development is […]

  • Go object-oriented thought: encapsulation, inheritance and polymorphism


    How do go implement encapsulation, inheritance, and polymorphism Encapsulation: go realizes the public and private of class methods and attributes through the case of the initial letter Inheritance: use the embedded method to inherit the structurestructCombine Polymorphism: Usinginterfacerealization Encapsulation: go simulates classes through the method of structs package objects //Simulate classes by means of structs […]

  • Rust programming video tutorial (Advanced) – 011_ 3 dereference polymorphism


    Video address Headline address:https://www.ixigua.com/i677586170644791348…Station B address:https://www.bilibili.com/video/av81202308/ Source address GitHub address:https://github.com/anonymousGiga/learn_rus… Explanation content 1. Dereference forced polymorphismExample: follow the example above fn hello(name: &str) { println!(“Hello, {}!”, name); } fn main() { let m = MyBox::new(String::from(“Rust”)); hello(&m); // When dereferencing here, force polymorphism and change & string to & str. otherwise, you need: Hello (& (* […]

  • Java object oriented instanceof keyword


    entrance   Java has three object-oriented features: Encapsulation: Some information of the class is hidden inside the class, and external programs are not allowed to access it directly. Instead, the operation and access of hidden information are realized through the methods provided by the class. Inheritance: Inheritance is a kind of relationship between classes, which […]