import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import java.util.concurrent.locks.Condition;

class Traad {
    public static void main(String[] args) {
        Task task = new Task();
        Thread t1 = new Thread(task);
        Thread t2 = new Thread(task);
        t1.start();
        t2.start();

    }
}

class Task implements Runnable {
    int teller = 0;
    Lock laas = new ReentrantLock();
    Condition erFerdig = laas.newCondition();

    @Override
    public void run() {
        for (int i = 0; i < 10000; i++) {
            laas.lock();
            try {
                teller++;
            } finally {
                laas.unlock();
            }
        }
        System.out.println("Traaden er ferdig, teller er: " + teller);
    }
}