Programming VIP

Concurrent programming Executor thread pool principle and source code analysis ThreadPoolExecutor default thread pool Creation of thread pool public ThreadPoolExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit, ...

Advantages of thread pool The work done by the thread pool is mainly to control the number of running threads, put tasks into the queue during processing, and then start these tasks after threads are created. If the number of threads exceeds the maximum number, the exceeded threads queue up, wait for other threads to complete execution, and ...

preface In the multithreaded environment, many classes we use everyday have thread safety problems, such as ArrayList, HashSet and HashMap. How should we deal with the thread problem in the multithreaded environment? What is the CAS algorithm? Is there any other way to achieve thread safety other than synchronized? Optimistic lock? Pessimis ...

  Prepare for 2022 spring recruitment or summer internship. I wish you a little progress every day! Java Concurrent Programming Day8This article summarizes how to avoid creating unnecessary objects in Java, which will be updated daily~For knowledge points such as "let's learn Redis together" and "let's learn HarmonyOS togeth ...

2, J.U.C 1. * AQS principle 1. General Its full name is AbstractQueuedSynchronizer, which is the framework of blocking locks and related synchronizer tools characteristic: The state attribute is used to represent the state of resources (exclusive mode and shared mode). Subclasses need to define how to maintain this state and control how ...

1. Thread pool     As we all know, a thread is an executing branch of a process     On the operating system, scheduling is carried out on a site by site basis     => Theoretically, the more threads a process has, the higher its processing efficiency     But in fact, it is affected by the operating s ...

preface This article belongs to the column "100 problems to solve Java concurrency". This column is original by the author. Please indicate the source of quotation. Please help point out the deficiencies and errors in the comment area. Thank you! Please refer to table of contents and references for this column 100 problems to sol ...

preface This article belongs to the column "100 problems to solve Java concurrency". This column is original by the author. Please indicate the source of quotation. Please help point out the deficiencies and errors in the comment area. Thank you! Please refer to table of contents and references for this column 100 problems to sol ...

Locks are used to control how multiple threads access shared resources. Generally speaking, a Lock can prevent multiple threads from accessing shared resources at the same time (but some locks can allow multiple threads to access shared resources concurrently, such as read-write locks). Before the emergence of the Lock interface, Java progra ...

Lock Lock is the core tool in J.U.C. its function is the same as synchronized explained earlier. It is also used to solve thread safety problems in multithreaded environment. In the J.U.C package, the lock mechanism is used in many places. J. The full name of U.C is java.util.concurrent. It is a common toolkit in concurrent programming. Th ...