Programmer Think

1. Process? Thread? Multitasking? In fact, there are a lot of cool programs in each process, such as cool browser, cool video, and so on. The thread is a branch or phenomenon in the process, which is an independent execution path. A process includes at least one thread. Threads can be understood as improving the efficiency of program operation, ...

Mengxin entering the pit (please comment in the comment area if you have any suggestions) This is the first article I published and the beginning of my entry into society. I firmly believe that as long as I work hard, I will become a big man in the future. (I will often publish some knowledge points and some small java projects in the futu ...

1. Retry of sequential messages For sequential messages, when the consumer fails to consume the message, the message queue RocketMQ will automatically retry the message continuously (with an interval of 1 second). At this time, the application will be blocked in message consumption. Therefore, when using sequential messages, it is important to ...

catalogue   1, Foreword 2, Final effect 1. Chat server 2. Chat client 3. Web administration console 3, Demand analysis 4, Outline design 1. Technology selection 1) Chat server 2) Web administration console 3) Chat client 4)SpringBoot 5) Code construction 2. Database design 3. Communication design 1) Message protocol format 2) ...

Thread pool ThreadPoolExecutorintroduceThread pool mainly solves two problems: one is that thread pool can provide better performance when executing a large number of asynchronous tasks. When the thread pool is not used, a new thread is required to execute whenever a task needs to be executed. Frequent creation and destruction consume performan ...

Thread pool ThreadPoolExecutor 1, Constructor public ThreadPoolExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit, lockingQueue<Runnable> workQueue) { this(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue, Executors.defaultThreadFactory ...

Before reading this article, you need to understand how to define enumeration and its simple use enumeration 1, How the JVM handles enumerations A simple enumeration class public enum Fruit{ APPLE(67),ORANGE(68),BANANA(69); int code; Fruit(int code){ this.code=code; } } Decompile fruit. Using the Jad command C ...

In Java, a text block is a multiline string text. This means that we don't need to get into the mess of explicit line terminators, string joins, and separators, which are usually used to write ordinary string text. Java} text blocks are available in Java 13( JEP 355) and Java 14( JEP 368  )As a preview function. It is planned to become a st ...

I Lock interface Lock interface is the foundation of everything. Its abstract class is a tool used to control the access of multiple threads to shared resources The following methods are provided to abstract the whole business: void lock()void lockInterruptibly() throws InterruptedException: breaks the lockboolean tryLock(): non blockin ...

1, Buffer stream Buffer stream is also called efficient stream, which is an enhancement of four basic FileXxx streams. Therefore, it is also four streams, which are divided into: Byte buffer stream: BufferedInputStream,BufferedOutputStream Character buffer stream: BufferedReader,BufferedWriter Basic principle of buffer flow: When creating ...