I am trying to stop a long running method after 10 seconds of execution, so far i followed the timer instructions on baeldung. https://www.baeldung.com/java-stop-execution-after-certain-time#1-using-a-timer When the method is a simple call to a thread sleep it works, but when I call my function with sub metho…
Tag: multithreading
Java MultiThreading task, three smokers and one agent
the task consists of three smokers which are three threads and one class called Agent which has three attributes Tobacco, Lighters and Paper. Smokers only have one of these items with them, agent class is supposed to put two items randomly on the table and then Smoker is supposed to check if they are missing …
What is the purpose of fairness parameter in REENTRANT LOCK in JAVA?
I found the following text while going through Java doc of Reentrant lock: fairness of locks does not guarantee fairness of thread scheduling. Thus, one of many threads using a fair lock may obtain it multiple times in succession while other active threads are not progressing and not currently holding the loc…
Converting serially reading multiple files to reading them in parallel? [closed]
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 1 year ago. Improve this question Following code in Java reads multiple files one after another serially and …
Is it possible to run java code when activity is not launched?
I am working on an alarm java application. I want to run Alarm(); function when the systems clock arrives to the targetTime. But I want to do these even the application is not open. So somehow I want to run it in androids background. My code : And this is the class for the DateTimeAlarm : I have no idea
Count only currently active threads
I have a list of Thread and I want to count only currently active threads, but method isAlive() don’t work. How correctly is this or exist other method check for currently active threads. Answer tl;dr Compare the state of the thread: Here is an example making a stream from your list of Thread objects. O…
Are CompletableFutures thread safe? [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 1 year ago. Improve this question I have a thread that invokes to separate threads. It passes in the same CompletableFuture to …
What Happens when a thread doesn’t throw an exception?
I notice, in this javadoc, https://docs.oracle.com/javase/7/docs/api/java/lang/Thread.UncaughtExceptionHandler.html that an UncaughtExceptionHandler is used for when an exception occurs but is not caught. But, will that thread fail quietly? I guess so, because it is going about its business asynchronously, bu…
is synchronized needed in getValue() ? & volatile needed?
I’ve a class in multithreading application: Answer The keyword volatile gives you the visibility aspects and without that you may read some stale value. A volatile read adds a memory barrier such that the compiler, hardware or the JVM can’t reorder the memory operations in ways that would violate …
Looking for Java Multithreaded Client-Server chat application with database tutorial
Im trying to build a Java Multithreaded Client-Server chat application with a database. The database is to store username and password. I am able to build a basic Java Multithreaded Client-Server chat application, but have no idea how to create the database side. Ive found lots of downloadable source code but…