import java.util.concurrent.locks.*;

public class MyTask implements Runnable {
    private int sharedCounter = 0;
    private final int MAX_COUNT = 10000;
    private Lock laas = new ReentrantLock();

    @Override
    public void run() {
        for (int i = 0; i < MAX_COUNT; i++) {
            laas.lock();
            try {
                sharedCounter += 1;
            } finally {
                laas.unlock();
            }
        }
        System.out.println("DONE! The shared counter is now: " + sharedCounter);
    }
}