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What is deadlock? Multiple threads occupy some shared resources and wait for the resources occupied by other threads to run. As a result, two or more threads are waiting for each other to release resources and stop execution When a synchronization block has "locks of more than two objects" at the same time, the phenomenon of "de ...

This article is also published in my WeChat official account. It can scan the two-dimensional code at the bottom of the article or search for Guo Lin in WeChat. Good morning, guys. With the official release of Android 11, the Jetpack family has also introduced many new members. I promised before that I would write an article to introduce th ...

The two core contents of spring are ioc and aop. This chapter introduces the concept, function and usage of ioc. ioc brief introduction: Concept: inversion of control, the creation of objects and the calling process between objects are handed over to Spring for management The purpose is to reduce coupling Underlying principles: xml parsing, f ...

object-oriented encapsulation One of the core ideas of object-oriented programming is to encapsulate data and operations on data. Through abstraction, common properties are extracted from concrete examples to form general concepts, such as the concept of classes. People often talk about the motor vehicle class is a concept formed by ex ...

Object oriented concept Process oriented & object oriented Process oriented thought The steps are clear and simple. What to do in the first step and what to do in the second stepFacing the process, it is suitable to deal with some relatively simple problems Object oriented thought Birds of a feather flock together in a classif ...

1, springboot Basics 1.1 general Spring Boot can easily and quickly create applications based on the spring framework, which enables coding, configuration, deployment and monitoring. Spring Boot has attracted much attention in the industry because it simplifies the complexity and makes the development extremely simple and fast. 1.2 character ...

Learning objectives: Objective: to skillfully use the knowledge of Java Learning content: Content of this article: using java to solve parameter parsing Title Description Enter the following command on the command line: xcopy /s c:\ d:\， The parameters are as follows: Parameter 1: command word xcopy Parameter 2: string / s ...

IO: refers to the flow of data transfer between devices Classification by flow direction: Input stream Output stream Classification by data type: Byte stream A: byte input stream InputStream             FileInputStream: FileInputStream fis = new FileInputStream("file name of read data"); Byte buffered input stream: BufferedInputStream ...

Technical work should be rewarded follow+Click three times (like, comment, collect) and watch again to form a good habit RocketMQ tutorial related series directory catalogue Section I: server preparation Section 2: installing RocketMQ Create rocketmq storage directory Modify runbroker sh Modify runserver sh Section III: Configuration ...

1, Using the String class The String object calls the public String replaceAll(String regex,String replacement) method to return a new String object. The character sequence of the returned String object is the character sequence obtained by replacing all sub character sequences matching the parameter regex in the character sequence of the curr ...