wait and notify

Program | multithreading | Design One: Understanding multithreading Multithreading is a mechanism that allows multiple instruction streams to be executed concurrently in a program, each of which is called a thread, independent of each other. A

this blog post for the original, reproduced please specify the source! http://blog.csdn.net/zimo2013/article/details/401813491. Overview In the same process, multiple threads can be created to share the same block of data space, and the

Many server applications, such as WEB servers, database servers, file servers, or mail servers, are geared toward handling a large number of short tasks from certain remote sources. Requests arrive at the server in some way, either through a network

In our previous discussion of stopping thread, we used the practice of setting tags, once the done set is true, the thread will end, and once false, the thread will run forever. This will consume a lot of CPU cycles and is an unfriendly behavior to

This article goes on, and then we introduce the wait () and notify () methods, and we all know that the two methods are not the same as the methods described earlier, that is, the two methods are object objects, not on the thread class . We also

Wait NotifyA few points to note:The wait and Notify/notifyall methods must be used in a synchronous code block, which is to lock the calling object first.When the thread executes wait (), it releases the current lock and then yields the CPU and

From: http://blog.csdn.net/peijunlin/archive/2008/12/20/3564559.aspx Java introduced a synchronization mechanism to solve access conflicts in shared storage areas. Now let's examine the access of multiple threads to shared resources. Obviously, the

Sole purpose of using concurrency is to produce scalable and faster program. But always remember, the speed comes after correctness. Your Java program must follow their invariant in all conditions, which it would, if executed in sequential manner.

Why use a thread pool?Many server applications, such as WEB servers, database servers, file servers, or mail servers, are geared toward processing a large number of short tasks from some remote sources. The request arrives at the server in some way,

In concurrent programming, we typically encounter the following three problems: atomicity, visibility, order. Let's take a look at these three concepts in detail:1. atomicityAtomicity: That is, one operation or multiple operations are either

Study questions: 1, talking about the difference between process, thread, and co-processesStudy questions: I hope everyone positive thinking, and can be enthusiastic to say their own ideas, regardless of the right and wrong, as long as it is a kind

Wait,notify,notifyall is an instance method defined in the object class, used to control the state of threads, and when a thread is collaborating, everyone uses the Notify () or Notifyall () method. Where wait and notify is an important part of the

When multithreading is performed concurrently, there may be dependencies between the contents of different threads, such as thread one executes the A () method and the C () method, thread two executes the B () method, method A () must be executed

1, the concept of threading 1.1 programs, processes, and threads Program: Program with static code, such as source program, target program. Process: A process is a dynamic execution of a program. Normally we can see the system process in Windows

Positive Solutions Blog: 59731447always call wait and notify in the loop (loop), not in the IF statementNow you know that wait should always be called in the context of the synchronized and the object that is shared by multithreading, and the next

In this chapter, the thread wait/wake method is introduced. The topics involved include:1. Wait (), notify (), Notifyall () and other methods introduced2. Wait () and notify ()3. Wait (long Timeout) and notify ()4. Wait () and Notifyall ()5. Why

I saw the use of lock yesterday when I was learning about the interview experience shared by others. Think of myself in the last interview also encountered the difference between synchronized and lock and use. So I sorted out the difference and use

This series is based on the gold course, in order to better study, do a series of records. This article mainly introduces 1. What is thread 2. Basic operation of threads 3. Thread priority 5. Basic thread Synchronization operations 1. What is a

ObjectiveSpeaking of communication between threads: According to my understanding, there are two main types.1. Is through the sharing of variables, between the threads through this variable for collaborative communication;2. Through the queue (which

Wait (), notify (), Notifyall () are not part of the thread class, but belong to the object base class, which means that each pair has wait (), notify (), Notifyall ()function. Because all have a lock on the image, the lock is the basis of each pair