Have you applied the volatile modifier in your projects?

The volatile modifier in Java is used to ensure visibility of variable changes between threads. If a variable is declared as volatile, then reading and writing to this variable happens directly from main memory, not from the thread's cache, preventing caching and ensuring data freshness.

I have used volatile in projects when I needed to guarantee that one thread would see changes made by another, without using heavier synchronization mechanisms, for example, for thread stop flags or simple status indicators.

Example:

public class Flag {
    private volatile boolean running = true;

    public void stop() {
        running = false;
    }

    public void run() {
        while (running) {
            // perform task
        }
    }
}

Here, volatile guarantees that the change to running in the stop() method will be immediately visible in the run() method in another thread.