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

public class CountMonitor {
    private int sharedCounter = 0;
    private Lock laas = new ReentrantLock();

    public void increment(){
        laas.lock();
        try{
                sharedCounter += 1;
        }finally{
            laas.unlock();
        }
    }

    public int getCounter(){
        return sharedCounter;
    }
}