Share your experience in developing and debugging multithreaded applications.

When developing multithreaded applications in Java, I use standard tools from the java.util.concurrent package, such as ExecutorService for managing threads and Future for obtaining results of asynchronous tasks. For synchronization, I apply synchronized, ReentrantLock, or atomic classes from java.util.concurrent.atomic.

Debugging multithreading requires special attention to race conditions and deadlocks. To find issues, I use profiling tools like VisualVM or Java Flight Recorder, as well as logs indicating thread identifiers. In complex cases, I employ step-by-step debugging and thread stack analysis.

Example of creating a thread pool and executing a task:

ExecutorService executor = Executors.newFixedThreadPool(4);
Future<Integer> future = executor.submit(() -> {
    // Some computational task
    return 42;
});

try {
    Integer result = future.get();
    System.out.println("Result: " + result);
} catch (InterruptedException | ExecutionException e) {
    e.printStackTrace();
} finally {
    executor.shutdown();
}