// Example of using CountDownLatch in Java
import java.util.concurrent.CountDownLatch;
public class ExampleCountDownLatch {
private static final int NUMBER_OF_THREADS = 3;
public static void main(String[] args) throws InterruptedException {
CountDownLatch latch = new CountDownLatch(NUMBER_OF_THREADS);
for (int i = 0; i < NUMBER_OF_THREADS; i++) {
new Thread(new Worker(latch)).start();
}
latch.await(); // Wait for all threads to finish
System.out.println("All threads have finished execution.");
}
static class Worker implements Runnable {
private final CountDownLatch latch;
Worker(CountDownLatch latch) {
this.latch = latch;
}
public void run() {
try {
// Simulate work
Thread.sleep(1000);
System.out.println("Thread completed work.");
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
} finally {
latch.countDown(); // Decrement the count of the latch
}
}
}
}
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