https: www.jianshu.com p 2ab. for example, this sentence LoadLoad Barrier: for such a statement, Load1; LoadLoad; Load2, ensures that the data to be read by Load1 is read before the data to be read by Load2 and subsequent read operations is accesse...

the browser has JS engine thread, GUI rendering thread, event thread, timer thread, network thread, event polling processing thread. It is often said that the worker thread works under the deployment of the main thread, so is the main thread the JS engin...

Gods, I just learned java multithreading has a problem there are two ways to create a thread the first myTest a = new myTest(out,"ccc"); new Thread(a).start(); new Thread(a).start(); the second type new Thread(new myTest(...

how to understand instruction reordering has no effect on single thread, it will not affect the running result of the program, but it will affect multi-thread. for example: int i = 0; 1 i = i + 1; 2 System.out.println(i); 3 if reordering is pe...

recently read "Java concurrent programming practice, " in Section 4.4.1, there is an example: suppose we need a thread-safe List, that needs to provide us with an atomic "put-if-absent " operation. And two implementations are provided: A non-thread...

the approximate code is as follows: func(id, ip){ int countId = jedis.hget("count", id); int countIP = jedis.get("count", ip); if(countId >= 5 || countIP>=5){ return; } ...

package com.example.demo; import java.util.concurrent.locks.ReentrantLock; public class Task implements Runnable { ReentrantLock lock; int i = 0; public Task(ReentrantLock lock) { this.lock = lock; } @Override public ...

in the following figure, while thread An executes the synchronized method of obj, thread B can execute other non-synchronized methods of obj I have read several blogs on the Internet, and most of them say yes. But as I understand it, when thread A ...

the code is as follows: import static java.lang.System.out; ** * * * @author *** * @create 2018-11-13 19:48 * public class Test0001 { public static Object OBJ = new Object(); public static int i; public static class MyThread1 exte...

as mentioned in the question, is java multithreading a big promotion for programs with a large number of io? For programs with a large number of io, how can we improve the speed without adding hardware ...

CallerRunsPolicy discard policy in Java thread pool ThreadPoolExecutor means that the thread that starts the thread pool runs extra threads. What if the thread that starts the thread pool is running some extra thread and there is a bunch of extra threads...

I have several tasks that need to be executed all the time. In the task, a method is called to get the value, blocking the attempt to get the value for 10 minutes, and then exit the thread if the value is not available 10 minutes later. These tasks are m...

public void method(){ ... for(Object obj: finalObjects){ .... doSth(obj); .... } } when I was traversing ArrayList in the main thread, java.util.ConcurrentModificationException occurred. has checked doSth and di...