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Most of the tools in the JUC package are based on AQS, so let's learn the principle of AQS first 1.AQS principle 1.1 overview: The full name is AbstractQueuedSynchronizer, which is the framework of blocking lock and related synchronizer tools 1.2 features: The state attribute is used to represent the state of resources (exclusive mode and ...

Multithreading Create thread There are three ways to create threads Inherit the Thread class and override the run methodImplement Runnable interfaceImplement Callable interface Inherit Thread class Inherit the Thread class and override the run method package Thread; public class MyThread extends Thread{ @Override public void run( ...

catalogue 1. Process of thread parameter transfer 1.1 arguments of built-in types 1.1.1 parameter transfer by value 1.1.2 if you want to pass by reference, you need to call std::ref 1.2 class type arguments 1.2.1 passing is an lvalue object 1.2.2 passing is a temporary object (i.e. right value object) 1.2.3 parameters passed need implic ...

Xiaobai's big data journey (27) Java object-oriented advanced multithreading security and wake-up mechanism Last review In the last issue, we learned the concept of multithreading and the basic use of multithreading. This chapter explains the remaining knowledge points of multithreading, thread safety and solution, and locking mechanism. Aft ...

Reprinted from: Original link Author: https://gosaintmrc.github.io/ Recently, a meituan interview question appeared on the Internet: "after one thread is OOM, can other threads still run?". I think there are many unreliable answers on the Internet. This question is actually very difficult. The knowledge points involved include ...

ThreadFactory Where do the threads in the thread pool come from? It's threadvector public interface ThreadFactory { Thread newThread(Runnable r); } There is an interface in Threadfactory. This method will be called when a thread needs to be created in the thread pool. You can also customize the thread factory public class Threadfac ...

1. Basic concepts program A program is a set of instructions written in a certain language to complete a specific task. That is, a piece of static code (not yet running), static object. process Process is an execution process of a program, that is, the program runs, loads into memory, and occupies cpu resources. This is a dynamic process ...

Generally, there are only two ways to create a Thread: one is to inherit the Thread, and the other is to implement the Runnable interface. However, these two creation methods have no return value, and you have to use shared variables or other communication methods to get the results processed by the Thread. It is generally not recommended to c ...

lock method analysis final void lock() { acquire(1); } The lock method calls the acquire method of AbstractQueuedSynchronizer /** * Acquires in exclusive mode, ignoring interrupts. Implemented * by invoking at least once {@link #tryAcquire}, * returning on success. Otherwise the thread is queued, possibly ...

4.26-4.27 multi thread learning notes Multithreading 1. Threads are independent execution paths 2. A process contains threads, which may execute a process, and multiple threads are executing at the same time. 3. If multiple threads are opened in a process, the operation of threads is scheduled by the scheduler. The scheduler is closely ...