Singleton writes a field in unsynchronized manner

I am getting : Singleton class writes to a field in an unsynchronized manner at 4-5 places in Springboot code while scanning through SonarQube. Now, I am trying to understand how can I make this …

How can I guarantee a thread is safely unlocking a lock upon termination, while all methods already handle it?

A server project, might run for very long time and create many threads. In the following code I ask myself do i have to protect the lock somehow in addition to an overall try catch in method setData(…

How to pause the current loop without pausing current running thread in Android / Java?

In my android application, In my fragment, I have one while loop like startMs=0, endMs=30000; while(i<10){ new Mp4Composer(inputPath, destPath) .trim(startMs, ...

how to understand this interface Executor example in Java API docs [closed]

Can anyone help to explain this piece of code in details? class SerialExecutor implements Executor { final Queue tasks = new ArrayDeque(); final Executor …

Waiting for a task inside a thread pool using SwingWorker java

I’m simulating multiple Tasks inside a thread – when all of them should report to a GUI. So I have a unique form that has 4 Panels inside which should reply and do different Tasks.. they should each …

How to run a thread for one hour in java

I will be receiving an attribute and I want to run a job for that attribute for 1 hour – monitoring and logging things related to that attribute. After that one hour, the job will stop. Is there a way …

How to set ThreadPoolTaskExecutor if sending numerous http requests at same time?

In my case, I need to send over million of http requests to client’s app for popping notification. like below sudo code int numOfHttpReq = 1000000; for (int i = 0; i < numOfHttpReq; i++) { call ...

JNI 8 C++ : Thread attach and detach And async callback

How to async call Java method from std::thread ? Let’s assuming this is a IM bot sdk, Because it’s logic basicly a IM bot sdk. The most importtant is: How to async call java method and callback native….

Why Kotlin/Java doesn’t have an option for preemptive scheduler?

Heavy CPU bound task could block the thread and delay other tasks waiting execution. That’s because JVM can’t interrupt running thread and require help from programmer and manual interruption. So …

The strange behavior of the Java Deque in muti-thread environment

I wrote a simple demo code to test “how the Daemon Thread works”. But the demo shows another strange behavior: I make a Deque to hold the element called Event, and share it for two work …