import java.io.InterruptedIOException;
import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;

class EksCyclic {
    public static void main(String[] args) {
        CyclicBarrier cb = new CyclicBarrier(5);
        for (int i = 0; i < 5; i++) {
            new Thread(new TraadCyclic(i, cb)).start();
        }
    }   
}

class TraadCyclic implements Runnable {
    private CyclicBarrier cb;
    private int id;

    public TraadCyclic(int id, CyclicBarrier cb) {
        this.id = id;
        this.cb = cb;
    }

    @Override
    public void run() {
        System.out.println("Trad " + id + ": Venter forste gang");
        try {
            cb.await();
        }
        catch (InterruptedException | BrokenBarrierException e) {
            System.out.println("Ble avbrutt");
        }
        System.out.println("Traad " + id + ": Venter andre gang");
        try {
            cb.await();
        }
        catch (InterruptedException | BrokenBarrierException e) {
            System.out.println("Ble avbrutt");
        }
    }
}