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

public class Monitor {
    Lock lock = new ReentrantLock();
    int antallAvOrd = 0;


    public void increase(){
        lock.lock();
        try {
            antallAvOrd++;
        } finally {
            lock.unlock();
        }
    }
}