What tools and methods did you use when implementing multithreading in your projects?

In Java projects, I used several approaches to implement multithreading:

• The Thread class and the Runnable interface for creating and starting threads.
• ExecutorService from the java.util.concurrent package for managing thread pools, which allows efficient reuse of threads and control over their number.
• Synchronization using the synchronized keyword and classes from java.util.concurrent.locks (e.g., ReentrantLock) to protect shared resources.
• Use of atomic classes (AtomicInteger, AtomicBoolean) for lock-free operations.
• High-level constructs such as CountDownLatch, Semaphore, CyclicBarrier for thread coordination.

Example of creating and starting a thread using ExecutorService:

ExecutorService executor = Executors.newFixedThreadPool(3);
executor.submit(() -> {
    System.out.println("Executing task in thread " + Thread.currentThread().getName());
});
executor.shutdown();