Programming VIP

1. Assignment Two assignment methods Static initialization: define the contents of the array directly from the beginning Dynamic initialization: open up the space first, and then assign values later. You can not assign all values (at this time, the initial values are not assigned, such as 0 and null) // statement int[] ids; //1.1 s ...

catalogue I. Introduction Second, write source code 2.1 create server and client 2.3 create function Three renderings IV. summary V. source code I. Introduction Readers can understand the code and self-made by mastering the basic knowledge of multithreading, io flow and network programming. It is very easy to understand and learn. T ...

1. Configuration structure dependency   Directory structure diagram   package. Dependencies in JSON "devDependencies": { "@babel/core": "^7.15.0", "@babel/polyfill": "^7.12.1", "@babel/preset-env": "^7.15.0", "babel-loader": "^8.2.2", "clean-webpack-plugin": "^4.0.0-alpha.0", "core-js": "^3.16.4", "css-loa ...

catalogue 1. What is spring 2. Why use Spring? 3. Environmental construction 3.1. Create a java project and import the corresponding jar package 3.2. Create configuration file 3.3. Add corresponding modules 3.4. Hand over bean instantiation to Spring 3.5 testing 4. Injection by construction method 5. General attribute injection 6,sco ...

1 definition of AOP AOP (Aspect Oriented Programming) means: Aspect Oriented Programming, which realizes the unified maintenance of program functions through precompiled mode and runtime dynamic agent. Aspect oriented programming is a supplement to object-oriented programming. It encapsulates the parts commonly called by each business mod ...

Long live your health and innocent business. Hello, I'm Laity and your brother J. Introduction to JavaWeb Use Java technology to solve the technology stack in the related web Internet domain (in fact, to develop a website) Java has a long history with a wide range of api s. (Background Development Engineer major database and JavaWeb program ...

Pessimistic lock When modifying a piece of data, in order to prevent others from changing the data at the same time, we can lock the data through the locking mechanism to prevent concurrency problems;   Threads think that thread security problems are easy to occur and lock the code. Because the process of locking and releasing pess ...

This article is excerpted from Spring 5 core principles 1. Idea integrated Lombok plug-in 1.1 installing plug-ins IntelliJ IDEA is an excellent integrated development tool with powerful functions and many plug-ins. Lombok is an open source code generation library and a very practical gadget. When editing entity classes, we can use Lombok a ...

Java learning punch in: days 90 and 91 javaWeb —JSP Servelet HTML+CSS and JavaScript were briefly introduced before, but only the interface problem can be solved. At that time, although it was mentioned that JSON can realize front-end and back-end interaction, JavaScript and java interaction, how the submitted form is sent to our ...

This article introduces the related concepts and specific usage of Java JMX technology. 1. What is JMX? Java Management Extensions (JMX) technology is the standard function of Java SE platform. It provides a simple and standard way to monitor and manage resources. It gives a clear structure and design pattern for how to define a resource. ...