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?? Author home page: Li Yangyong? ?? Introduction: high quality creator in Java field Java Li Yangyong, author's resume template, learning materials, interview question bank, technical assistance [pay attention to me and give it to you] ?? Welcome to like?? Collect messages?? Video demonstration: get the contact information of the ...

In recent work, you need to optimize the previous web side code editor. As a back-end developer, although I'm not professional, I can only bite the bullet. After consulting a lot of materials, I still optimized some contents. Let's share them here. If there is something wrong, please forgive me. After all, it's very tired to play with pure hand ...

To facilitate users to quickly master and understand spire Xls, the following small series summarizes and arranges a series of common problems in the trial process of probationers, hoping to help you! ---------------<<Spire. Download the latest version of xls>>  (1) How do I add an image to Excel? A: please call the Add method to ...

Some basic concepts of object-oriented Software engineering Sixth Edition The following are the essence of object-oriented, well absorbed, completely mastered. Take a Circle as an example. It has radius, perimeter, color and position. Now we have three different circles, and each Circle is a different object. But they all have the same ...

Author: is he Tiantian there\Source: Juejin cn/post/6844904101483020295A previous article briefly introduced MDC. This time, we will have an in-depth understanding of MDC in combination with specific cases and specific problems in production.Introduction to MDC1. Introduction:MDC (Mapped Diagnostic Context) is a function provided by log4j, logb ...

Single point timed taskJDK nativeSince jdk1 After 5, ScheduledExecutorService is provided to replace TimerTask to execute scheduled tasks, which provides good reliability.public class SomeScheduledExecutorService {     public static void main(String[] args) {         //Create a task queue with a total of {10 threads         ScheduledExecutorSer ...

Introduction: Mybatis plus is an enhanced tool of Mybatis. After using Mybatis plus, we can not only use the unique functions of Mybatis plus, but also use the native functions of Mybatis normally. It provides some interesting plug-ins to simplify development and improve development efficiency, such as SQL performance monitoring, optimistic lo ...

preface Congratulations to all the friends who read this article for successfully unlocking the advanced feature plug-in version of RabbitMQ series Content of delay queue 🎁 Through this article, you will clearly understand: what is delay queue? Delay queue usage scenario? How to install the BBU # exchange # Q plug-in? 😄 At the end ...

Day 1 This section mainly explains some compiling environments of JAVA and some confusing basic knowledge. James Gosling received a bachelor's degree in computer science from the University of Calgary in Canada in 1977 and a doctor's degree in computer science from Carnegie Mellon University in 1983. After graduation, he worked at IBM and de ...

1. Lock interface Locks are tools that control access to shared resourcesLock and synchronize are the most common locks. They can achieve the purpose of thread safety, but they are quite different in use and functionLock does not replace synchronize, but provides advanced functions when synchronize is inappropriate or unable to meet require ...