Programmer Group

reference resources: https://tech.meituan.com/2018/11/15/java-lock.html https://www.cnblogs.com/jyroy/p/11365935.html Exclusive lock and shared lock are the same concept. Let's first introduce the specific concepts, and then introduce the exclusive lock and shared lock through the source code of ReentrantLock and ReentrantReadWriteLock. Exclu ...

Is it 2017?? Using collaborative programs in Unity is usually a good way to solve some problems, but it also has some disadvantages: 1. The collaborator cannot return a value. This encourages programmers to create huge monolithic collaborations instead of writing them in many small ways. There are some alternative methods, such as passing th ...

The content may be sloppy, but they are all basic and important things that I think, and they also involve two multi-threaded interview questions Multithreading Process process Thread thread The program is static Process is an execution process of a program. It is a dynamic concept. A process will have multiple threads that do not affect ea ...

6,PriorityBlockingQueue An unbounded blocking queue that supports prioritization. The elements entering the queue will be sorted according to priority. public class PriorityBlockingQueue<E> extends AbstractQueue<E> implements BlockingQueue<E>, java.io.Serializable The unbounded priority blocking queue uses an array to ...

Thread pool: common problems of business code In the program, we will use various pool optimization caches to create expensive objects, such as thread pool, connection pool and memory pool. Generally, some objects are created in advance and put into the pool. When they are used, they are directly taken out for use and returned for reuse. The n ...

1, Atomic operation class in JUC 1. Introduction to atomic classes in JUC What is atomic operation? atomic means atom in Chinese. In chemistry, we know that atoms are the smallest unit of general matter and are inseparable in chemical reactions. Here, atomic means that an operation is non interruptible. Even when multiple threads execute to ...

1. Example code: Runnable + ThreadPoolExecutor First create a Runnable Implementation class of interface (of course, it can also be Callable Interface. We also mentioned the area of the two above Don't MyRunnable.java import java.util.Date; public class MyRunnable implements Runnable { private String command; ...

reference resources: https://blog.csdn.net/qq_27581243/article/details/86650682 https://www.cnblogs.com/zincredible/p/10984459.html Thread is a heavyweight resource. The creation, startup and destruction of threads consume system resources. At the same time, it is limited by system resources. The relationship between the number of threads and ...

Thread pool execution principle and custom thread pool Thread pool execution principle: Daily record (1) . advantages of using thread pool:      Application of pooling Technology: thread pool, database connection pool, http connection pool, etc.      The idea of pooling technology is mainly to reduce t ...

Introduction to JMH JMH is a tool set dedicated to code micro benchmarking. JMH is developed by the team implementing Java virtual machine. Since the JVM has become more and more intelligent, it may be optimized to varying degrees in the compilation stage, class loading stage and running stage of java files, so the code written by developers ...