Paralelizacao de procedures via Thread

package paralelizar.procedure;

import java.util.concurrent.CountDownLatch;

public class Chamador {

	private static final int COUNT = 9;

	public static void main(String args[]) {
		// CountDownLatch(int count)
		// Constructs a CountDownLatch initialized with the given count.
		CountDownLatch startSignal = new CountDownLatch(1);
		CountDownLatch stopSignal = new CountDownLatch(2);
			new Thread(new Procedure(startSignal, stopSignal,"mensal")).start();
			new Thread(new Procedure(startSignal, stopSignal,"semestral")).start();
		System.out.println("Go");
		startSignal.countDown();
		try {
			stopSignal.await();
		} catch (InterruptedException ex) {
			ex.printStackTrace();
		}
		System.out.println("Done");
	}
}

package paralelizar.procedure;

import java.util.concurrent.CountDownLatch;

public class Procedure implements Runnable{

	CountDownLatch startLatch;
	 
    CountDownLatch stopLatch;

    String procedure;
    
	@Override
	public void run() {
		try
        {
            startLatch.await(); // wait until the latch has counted down to
                                // zero
        } catch (InterruptedException ex)
        {
            ex.printStackTrace();
        }
        System.out.println("Exeutando procedure: " + procedure);
        for(int i = 0 ; i < 100 ; i++){
		}
        stopLatch.countDown();
	}
	
	Procedure(CountDownLatch startLatch, CountDownLatch stopLatch, String procedure)
    {
        this.startLatch = startLatch;
        this.stopLatch = stopLatch;
        this.procedure = procedure;
    }
}

void main(){
   Thread t1 = new Thread();
   Thread t2 = new Thread();

   t1.start()
   t2.start();

   t1.join();
   t2.join();

   commit();
}