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Java thread pool: Core configuration parameters of thread pool: //The timeout of a thread waiting for a task. It takes effect when the number of threads in the thread pool exceeds the corePoolSize. When the thread waiting for a task exceeds keepAliveTime, the thread pool will stop threads that exceed the corePoolSize. private volatile long ke ...

Multithreading has always been a difficulty in Java development and a frequent visitor in the interview. While there is still time, I intend to consolidate my knowledge of JUC. I think opportunities can be seen everywhere, but they are always reserved for those who are prepared. I hope we can all refuel!!! Sink and float up. I think we will b ...

Note source: Dark horse programmers have a comprehensive and in-depth study of Java Concurrent Programming and a full set of tutorials of JUC concurrent programming Note source: AC_Jobim JUC concurrent programming tutorial Some personal opinions are attached. If there are mistakes, please correct them! 1, ThreadLocal details Good b ...

JUC concurrency 1. What is JUC JUC is the toolkit, package and classification under java.util. Business: common thread code ThreadRunnable has no return value, and its efficiency is relatively lower than that of CallableCallable has a return value! 2. Threads and processes Threads, processes, if you can not use a word out tec ...

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 ...

JUC overview 1.1 introduction to JUC java.util.concurrent package is an API for concurrent programmingThere are three packages related to JUC: java.util.concurrent, java.util.concurrent.atomic, and java.util.concurrent.locks 1.2 processes and threads Process: a running application in the system; A program is a process; The smallest unit of ...

ReentrantLock SynchronizedReentrantLockLock implementation mechanismObject header monitor modeRely on AQSflexibilityInflexibleSupport response interrupt, timeout and attempt to acquire lockRelease lock formAutomatic release lockShow call unlock()Support lock typeUnfair lockFair lock & unfair lockConditional queueSingle condition queueMulti ...

Thread pool ThreadPoolExecutor What is it: Workers' sweatshopWhat's the use: reduce resource consumption and facilitate thread managementHow to play: play with your new thread pool Thread pool principle Working principle of thread pool (advantages and disadvantages) When there is no thread pool, compare it with the wired process pool. It so ...

catalogue 1, What is JUC?   2, Processes and threads? 3, Locks package   ① The traditional synchronized lock keyword. Sync code block:   Synchronization method:   ② Lock lock 4, Consumer producer issues. 5, 8 lock phenomenon. 6, Collection class unsafe ① List (ArrayList) is not safe ② Set (hashSet) is not secure ...

16,JMM Understanding of Volatile Volatile is a lightweight synchronization mechanism provided by the Java virtual machine (similar to synchronized, but not as powerful as it) 1. Ensure visibility 2. Atomicity is not guaranteed 3. Prohibit instruction rearrangement What is JMM JMM: Java Memory Model, which does not exist, is a c ...