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Why did you write this article Since I wrote my first Python series column on June 13, 2021, I have successively updated 27 Python series articles. Here, I would like to thank readers for their support and reading, especially the little partners of one button three company. This column is named [Python from introduction to mastery], which is ...

Multithreaded First: Basic concepts: program, process, thread Program: A program is a collection of instructions written in a language for a specific task. That is, a static piece of code, a static object. Process: A process is an execution process of a program, or a running program, and is a dynamic process: it has its own process of genera ...

JDK1.7 First, the data is stored section by section, and then each section of data is equipped with a lock. When a thread occupies the lock to access one section of data, the data of other sections can also be accessed by other threads. ConcurrentHashMap is composed of Segment array structure and HashEntry array structure. Segment is a r ...

What is JUC Introduction to JUC In Java, the thread part is a key point. The JUC mentioned in this article is also about threads. JUC is the abbreviation of java.util.concurrent toolkit. This is a toolkit for processing threads, which began to appear in JDK1.5 Processes and threads A process is an operation or movement of a computer program ...

1, The example demonstrates the beginning of thread operation When the program runs, a process is generated, and the main thread to which the process belongs starts to run automatically; When the main thread returns from the main () function, the whole process is completedThe main thread starts to execute from main (), so the thread created by ...

Java Multithreaded-Blocked Queue introduce In concurrent programming, thread-safe queues are sometimes required. There are two ways to achieve a thread-safe queue: using a blocking algorithm and using a non-blocking algorithm. Queues using blocking algorithms can be implemented with one lock (the same lock for both queuing and queuing) or tw ...

1. synchronized concept 1.1 INTRODUCTION synchronized is different from ReentrantLock mentioned earlier. It is a keyword provided by the Java language. In a way, it is similar to CAS operation (native method). The synchronized keyword solves the synchronization of accessing resources between multiple threads. The synchronized keyword can ...

1. What is a thread? Source code - compile and link - > program - load into memory - > process                                        |                                  |                                     Documents         &nbs ...

Custom thread pool package com.sunhui.thread.CompletableFuture.util; /** * @Description * @ClassName ThreadPoolUtil * @Author SunHui * @Date 2021/9/24 9:47 morning */ import java.util.concurrent.Executors; import java.util.concurrent.LinkedBlockingQueue; import java.util.concurrent.ThreadPoolExecutor; import java.util.concurrent.Tim ...

1. Atominc Atom Package There are 12 classes in the Atomic package, and there are four ways to update atoms: the basic type of atomic update, the array, the reference, and the field. The classes in the Atomic package are basically wrapper classes implemented using Unsafe. Basic Classes: AtomicInteger, AtomicLong, AtomicBoolean Reference type ...