Support Forums: Message List - Java Objects in Multi-threaded Environment

Java Objects in Multi-threaded Environment

Wed, 25 Jan 2012 08:31:04 -0500

This singleinstance class ytsingleinstance.dll post helps you to find your solution...

multi-threaded environment static methods

Thu, 19 Jan 2012 13:14:10 -0500

Assertation that variables used by static methods all are allocated on stack is incorrect. If the static method uses static variables of the class they are not on the stack and you need a concurrent object for synchronization to avoid the racing...

Re: Java Objects in Multi-threaded Environment

Tue, 16 May 2006 10:41:51 -0400

Thanks for the reply....

Java Objects in Multi-threaded Environment

Tue, 09 May 2006 18:27:07 -0400

Sorry for delay in reverting back .. Got too much stuck up with work.

No even though the objects are retrieved from static HashMap they are still instances and the actual instance still lies in the heap. It behaves exactly like any normal...

Java Objects in Multi-threaded Environment

Thu, 04 May 2006 17:37:05 -0400

Thanks for the update.

Now related to that I have a question. A kind of singleton approach. I have a manger class that caches objects in a static HashMap (should sit in stack right?) .

At init of the class, I add one object each of other...

Java Objects in Multi-threaded Environment

Tue, 02 May 2006 09:15:28 -0400

All static methods and variables are present in stack unlinke instance methods and variables which are present in heap. Hence calling static methods is faster since there is no extra level of indirection. There is never a pool of static methods . A...

Java Objects in Multi-threaded Environment

Mon, 01 May 2006 16:06:38 -0400

Thanks

I am little confused about the concurrent execution of the static method. When one thread enters the static method, how the other thread concurrently execute the same method. We have only one copy of the method here right? I know JVM can...

Java Objects in Multi-threaded Environment

Fri, 28 Apr 2006 15:09:37 -0400

As far as the static methods are not syncrhonized other threads dont have to wait for the lock .. They simultaneously execute the method . Hence u need to be careful if the changes in your static variables affect your output in such a case . Static...

Java Objects in Multi-threaded Environment

Fri, 28 Apr 2006 14:13:40 -0400

Thanks both for the explanation..
I am not talking about a synchronized satatic method. I am talking about a 'regular public static method'. To give an example, say we have a utility class method (public static) to do some computational job. It gets...

Java Objects in Multi-threaded Environment

Fri, 28 Apr 2006 13:36:43 -0400

As explained above the thread executing the single instance of class object's static synchronized method has to first acquire a lock on that object to execute the method. Once it has entered the method the lock has been already acquired by that thread...

Java Objects in Multi-threaded Environment

Thu, 27 Apr 2006 18:47:11 -0400

Only one thread can executes the the synchronized static method or block at any point of time and the other threads would wait to get the lock for execution of same.
A lock is like a privilege that only one thread can "possess" at any one...

Java Objects in Multi-threaded Environment

Thu, 27 Apr 2006 14:27:01 -0400

Hi, Answering your first question : Thread safety for instance variables come into picture only when the same instance is accessed by many threads. Typical example would be a singleton instance...

Java Objects in Multi-threaded Environment

Wed, 26 Apr 2006 13:58:58 -0400

Hi,
Answering your first question :
Thread safety for instance variables come into picture only when the same instance is accessed by many threads. Typical example would be a singleton instance accessed by many threads...

Java Objects in Multi-threaded Environment

Thu, 20 Apr 2006 17:26:56 -0400

I am a java developer with more than 6 year of experience but still I am frequently haunted by some pretty basic questions about thread safely. I am having trouble with the following

1. I need to know how the private variables are handled in a...