java synchronized example

) { Try { for(inta=0;a) {System.out.println ("Thread" +mytest.currentthread (). GetName () + "Modify a==" +a); //Mytest.yield (); } } Catch(Exception e) {//Todo:handle Exception } } } } }Results returned:Thread 1 Modify A==0Thread 1 Modify A==1Thread 1 Modify a==2Thread 1 Modify A==3Thread 1 Modify a==4Thread 2 Modify A==0Thread 1 Modify a==5Thread 1 Modify A==6

, one will succeed, others will fail, so also expand.Then the expansion process. First, change the state value of the object lock flag and point the pointer saved in Mark Word to the mutex lock (of course, the content of Mark Word is still not lost) I'm looking at a deep understanding of the Java Virtual Machine book, plus some blogs on the web. I didn't make this part clear, this place i " guess ": Invoke an operating system mutex, generate a mutex,

Java synchronized is mainly used to control thread synchronization, in the middle there are a lot of small details, knowledge, here I simply tidy up, make a record. Primarily for methods and code block controlLet's talk about method control.Simulate bank deposits and withdrawals, create an account class, two attributes, a name and accout. First save 1w go in, with 1100 threads to take the money 1k and save

memory, the changes are made, there will be a thread out of sync problem.Out-of-sync strategyOK, the above is the cushion, the following is the focus, how to solve the thread synchronization problem. Java gives the concept of lock. The so-called lock image a little understanding is that a thread is using a resource like a person into a door, if not locked, others will come in, but if the lock, it means that the resource is exclusive to this thread, a

This blog is a previous Java Multithreading (iii) Producer consumer model and the implementation of the method complement. The producer consumer model is implemented in three methods (lock, synchronized, blocking queue). The specific content is: The producer produces the random number (in order to facilitate the reading result, I limit the random number to 10 integers), the consumer reads and prints. 1 blo

Multi-threaded synchronization mechanisms lock resources so that at the same time, only one thread can operate, synchronizing the problems that may occur when multiple threads are simultaneously accessed. The synchronization mechanism can be implemented using the SYNCHRONIZED keyword. When the Synchronized keyword modifies a method, the method is called a synchronization method. Locks are automatically rele

(int i = 0; i Output:Thread-0 1Thread-0 2Thread-0 3Thread-1 1Thread-2 1Thread-2 2Thread-2 3Thread-1 2Thread-1 3From the above output you can see that each thread is reading the value of the copy above the thread itself, and it modifies these without involving the original object.Summary: This section briefly describes the synchronization and threadlocal of synchronized on other objects to eliminate the synchronization of shared objects.This chapter i

-generated Catch blockE.printstacktrace (); } System.out.println ( This. name+ "Finish Your Teeth"); } //Peeing Public voidrelase () {System.out.println ( This. name+ "is urinating"); Try{Thread.Sleep (2000); } Catch(interruptedexception e) {//TODO auto-generated Catch blockE.printstacktrace (); } System.out.println ( This. name+ "Pee Complete"); }} Public classStart { Public Static voidMain (string[] args) {//TODO auto-generated Method StubRoom.p1.start (); Room.p2.start (); }}Ver

Java when writing multi-thread program, in order to ensure thread security, need to synchronize data , often use two kinds of synchronization is synchronized and re-enter lock Reentrantlock.Similar points:There are many similarities between these two modes of synchronization, which are both lock-in and synchronous, which means that when a thread obtains an object lock and enters a synchronization block, oth

Java latency instance analysis: Lock vs Synchronized This article discusses through examples: -Java. concurrent. Lock: Garbage created-Compare Lock and synchronized-How to calculate latency through programming-Impact of Lock and synchronized Competition-The possible impa

Synchronized the basis for synchronization is that every object in Java can be used as a lock. It is shown in the following 3 ways:1 for the normal synchronization method, the lock is the current instance object.2 for the static synchronization method, the lock is the class object of the current classes.3 for a synchronous method block, the lock is an object inside the