monitor « synchronize « Java Thread Q&A

1. Waiting for a Timer to finish in Java    stackoverflow.com

I'm using java.util.Timer to schedule a periodic task. At one point, I'd like to shut it down, and wait for it to finish. Timer.cancel() will prevent any future ...

2. Can a thread call wait() on two locks at once in Java (6)    stackoverflow.com

I've just been messing around with threads in Java to get my head around them (it seems like the best way to do so) and now understand what's going on with ...

3. is there any difference if thread is waiting for monitor to be freed before synchronized block or if it calls wait()    stackoverflow.com

I've read many docs about thread states, some of them tells that there is two different states: blocked (before synchronized) and wait (if calls wait), some others are telling that there ...

4. How heavy are Java Monitors?    stackoverflow.com

Say I have an array of thousands of objects, and a small number of threads that might access each of the objects. I want to protect the access to one of ...

5. How to see what monitor is a thread waiting for?    stackoverflow.com

I'm using netbeans and it's profiler to look at threads activity. The graphs shows that when there is more than a working thread executing, the threads can stay in a number of ...

6. How to ensure a java code section has the monitor    stackoverflow.com

So I'm writing an introductory java program to get used to multithreading, however, I'm having a little bit of trouble with the monitors. In particular, the below code section is ...

7. Will Java's synchronization update the complete cache, or only the object I synchronized on?    stackoverflow.com

If I access an object inside of a synchronized method or synchronized block, are all object in that accessed element also synchronized? Imagine there's an object Queue having a synchronized add() ...

8. How to know how much time cost by "synchronized" code, in Java?    stackoverflow.com

I've a Java application, which is not fast enough as I expected. I've done a lot of researches of how to improve it, but not lucky. Now I'm reviewing the code, and ...

9. BlockingQueue design with multiple monitors    stackoverflow.com

I am wrting a BlockingQueue and am wondering how other implementations solve this problem: If I only have one monitor (the queue object) and let producers and consumers wait, I will have ...

10. Java happend-before in synchronized block    stackoverflow.com

I need some help understanding the Java memory model.The following is a gerneric example to grasp the basic concept: Image I have an object instance called Shared and two threads A and ...

11. competing to get the control on object monitor in synchronized vs wait    coderanch.com

12. synchronization with Monitor    forums.oracle.com

13. which object's monitor does a synchronized method acquire?    forums.oracle.com

It's very simple. If a synchronized method is called at the same time from many threads only one call will be executed at a time. The calls will be lined up and performed one after the other in sequence. AND because synchronization is on a per object basis, when one synchronized method is being called from one thread, all synchronized methods ...