How do I use CyclicBarrier in Java?

How do I use CyclicBarrier in Java?

CyclicBarrier is a synchronization aid that allows a set of threads to all wait for each other to reach a common barrier point.

Can you give me an example of how to implement it?

Sure! Here's a simple example:

import java.util.concurrent.CyclicBarrier;

public class CyclicBarrierExample {
    public static void main(String[] args) throws Exception {
        CyclicBarrier barrier = new CyclicBarrier(3, () -> System.out.println("All parties have arrived at the barrier."));

        Runnable task = () -> {
            try {
                System.out.println(Thread.currentThread().getName() + " is waiting at the barrier.");
                barrier.await();
                System.out.println(Thread.currentThread().getName() + " has crossed the barrier.");
            } catch (Exception e) {
                e.printStackTrace();
            }
        };

        new Thread(task).start();
        new Thread(task).start();
        new Thread(task).start();
    }
}

What happens if one thread fails to reach the barrier?

If one thread fails to reach the barrier (e.g., it throws an exception), the other threads will remain blocked at the barrier until the barrier is reset or the program terminates.